The issues in this appeal are whether the sentence imposed on appellant should be reversed because (1) the court refused to suppress certain evidence of a gun and drugs found in the clothing of appellant and (2) the case was not tried within the time period mandated by Rule 1100 of the Rules of Criminal Procedure.
*137Appellant was arrested in a women’s clothing store on May 7, 1974, while allegedly attempting to rob the store. When he and another man walked into the store, Carolyn Abrams, who was operating the store alone at the time, became suspicious of the behavior of the men, went into the back room and telephoned the Philadelphia branch of her store for help. The message was promptly relayed to the police. While she was still'on the telephone, the two men entered the back room, the appellant carrying two bathing suits which he said he wished to purchase. As Mrs. Abrams began to write the sales slip, appellant took a gun from his pocket, put it against the left side of her ribs and said, “This is a stick up, give me all your money.” At that moment, the police arrived.
As the officer entered the store, he saw one man in the front of the store and the appellant in the back room with Carolyn Abrams. He went to the back room and asked what the problem was. He received no immediate answer, but observed that Mrs. Abrams looked “white as a ghost” and that appellant’s hands were shaking. He also observed that this back room did not appear to be a part of the store where customers were supposed to be and asked appellant to move to the front of the store. As appellant was leaving the back room, he began to take off his jacket and at that moment Mrs. Abrams told the officer that appellant had a gun. The officer thereupon placed both men against the wall and patted them down for weapons. A .32 calibre chrome-plated Iver Johnson pistol was found in the pocket of the jacket which appellant had been wearing.
Appellant was thereupon arrested, advised of his rights and taken to police headquarters where a routine search of his clothing revealed five plastic bags of methamphetamine, a schedule II narcotic.
A criminal complaint was lodged against appellant on May 7, 1974. He was indicted on December 13, 1974, and tried on September 10, 1975. The jury returned verdicts of guilty on *138charges of criminal conspiracy, robbery and a violation of the Controlled Substances, Drug, Device and Cosmetic Act. Motions for a new trial and in arrest of judgment were argued and denied and appellant sentenced, whereupon this appeal.
Appellant contends that the sentence should be set aside because appellant’s gun which was seized at the store and the methamphetamine which was taken from his coat pocket at the police station should have been suppressed on his motion because obtained without a search warrant.
The officer came to the store in response to a radio call to the effect that there were suspicious circumstances at the store. He found the female shopkeeper alone with appellant in the back room where under ordinary circumstances customers would not be. He saw another man in the front of the store and no one else present. He observed that the woman looked frightened. She told him that appellant had a gun. Based on this information and his own observations, he clearly had probable cause to believe that criminal activity had been or was in the process of being attempted. Accordingly the arrest and search were lawful and the evidence obtained therefrom; i. e., the gun, was admissible. The drugs found on appellant were also properly seized without a warrant since they were found pursuant to an appropriate inventory search in police headquarters after appellant was arrested. We conclude that neither the gun nor the drugs were obtained in violation of appellant’s constitutional rights and were properly admitted in evidence.
We now turn to the timeliness of the trial within the limits mandated by Rule 1100 of the Rules of Criminal Procedure. The calendar of events on which this issue is to be determined is as follows:
May 7,1974 Appellant arrested and criminal complaint lodged.
May 17,1974 Preliminary hearing held.
December 13,1974 Appellant indicted.
*139January 20,1975 Commonwealth filed a motion to extend time for trial, based upon judicial delays beyond the control of the prosecutor.
February 21,1975 Hearing held on motion and time within which to try the case extended to April 30.
March 10,1975 Trial scheduled to begin but Carolyn Abrams, the Commonwealth’s key witness, failed to respond to a subpoena and could not be located. On application of the Commonwealth, consented to in writing both by the appellant and his counsel, the case was continued because of the unavailability of the witness.
September 9,1975 Appellant’s motion to dismiss the case under Rule 1100 dismissed.
September 10,1975 Appellant tried and eonvicted.
January 27, 1976 Appellant sentenced.
The Commonwealth’s petition of January 20 to extend the time for commencing trial was filed within the 270 day limit set by Rule 1100(a)(1). The petition averred that the prosecutor had certified to the Montgomery County Court Administrator on December 13, 1974, that the case was ready for an immediate trial listing, but that the Court Administrator’s office had never so listed the case. On the basis of this showing of due diligence by the prosecutor and his inability to get the case scheduled for trial within the time limits of Rule 1100, the court extended the time for the commencement of trial to April 30.
The right of the court to grant such an extension because of delays attributable to the judicial system rather than the prosecutor’s office is challenged by the appellant. However, this issue has been laid to rest in two very recent decisions of the Supreme Court of Pennsylvania: Commonwealth v. Mayfield, 469 Pa. 214, 364 A.2d 1345 (October 8, 1976); Commonwealth v. Shelton, 469 Pa. 8, 364 A.2d 694 (October 8, 1976). In Mayfield it was squarely ruled that Rule 1100(c) should be interpreted to permit a trial court to grant a timely application by the Commonwealth to extend the prescribed time for trial on the sole ground that the *140court cannot schedule the trial within the period prescribed by the Rule.
The rationale of the ruling is elaborated upon in Shelton : “Section (c) of the Rule states that an application for an extension ‘shall be granted only if trial cannot be commenced within the prescribed period despite due diligence by the Commonwealth.’ ”
“The ‘Commonwealth’ in the context of the Rule clearly refers to prosecutorial officers and not to the judiciary. Literally read, the Rule quite simply does not attempt to solve the problem of eliminating delay due to the judiciary; rather, it attempts to eliminate delay due to lack of due diligence on the part of prosecutorial officers. Furthermore, if ‘judicial delay’ does not justify an extension, then in a situation where because of the unavailability of a judge or a court before whom to commence trial at a time prior to the expiration of the mandatory period, the Commonwealth despite the exercise of all due diligence would be unable to effectuate a prosecution. Such a result would render the due diligence exception a nullity and is therefore contrary to the rule of construction that requires ‘[ejvery [rule to] be construed, if possible, to give effect to all its provisions.’ ”
There remains for consideration the legal consequence of the continuance granted the Commonwealth on March 10, the day trial was scheduled to commence, because of the failure of the Commonwealth’s key witness to answer a subpoena and the inability of the prosecution to locate her.
Clearly the trial court would have been justified in granting a second extension of time under these circumstances, the Commonwealth having established its due diligence by its announced readiness to proceed since the previous December. However, instead of petitioning for an extension the Commonwealth moved for and was granted a continuance of the trial. Documents in the record indicate *141that defense counsel consented1 to the continuance and to a waiver of Rule 1100 by a written notation on the motion for continuance. Defendant also appears to have given his consent, based upon our review of a form he signed and the findings of the lower court at trial during a discussion of this issue with counsel. It was recently ruled in Commonwealth v. Myrick, 468 Pa. 155, 360 A.2d 598, 600 (1976) that Rule 1100 might be waived by such a signed statement in the record. We hold that such a waiver was established in this case.
Affirmed.
PRICE, J., files a dissenting opinion in which HOFFMAN and SPAETH, JJ., join.. Appellant argues on appeal that his counsel was ineffective for providing such consent. Appellant was represented at trial by privately retained counsel. An associate of that attorney filed post-trial motions, but then withdrew from the case, after which the appellant was represented by a public defender. Leave to file additional reasons for a new trial or for arrest of judgment was granted to appellant by order of the court below dated September 17th, 1975, however no additional reasons were filed. No claim of ineffective counsel was raised at any time by any defense attorney before the lower court. The lower court’s denial of post-trial motions occurred several weeks after the appointment of the public defender. Moreover, all post-trial proceedings in this case occurred after the issuance of such decisions as Commonwealth v. Dancer, 460 Pa. 95, 331 A.2d 435 (1975) and Commonwealth v. Twiggs, 460 Pa. 105, 331 A.2d 440 (1975). Accordingly, it is clear that the claim of ineffective counsel herein must be held to have not been properly preserved for appellate review. See Commonwealth v. Hubbard, 472 Pa. 259 at p. 275 n. 5, 372 A.2d 687 at p. 694 n. 5 (1977).
. Pa.R.Crim.P. 1100(a)(1) provides:
“Trial in a court case in which a written complaint is filed against the defendant after June 30, 1973 but before July 1, 1974 shall commence no later than two hundred seventy (270) days from the date on which the complaint is filed.”