¶1The instant case involves an appeal by the Commonwealth from a lower court order granting a defense motion in arrest of judgment. For reasons more fully set forth below, we reverse.
¶2The record shows that the appellee, Nathaniel Nelson, was tried on June 3rd and 4th, 1975, on four indictments charging terroristic threats, robbery, rape and theft by extortion. His trial was held before the Honorable Francis A. Biunno, sitting without a jury. At the conclusion of the trial, the judge found Nelson guilty on robbery and rape charges, but issued acquittals on the re*36maining charges. Following trial, appellee filed a motion in arrest of judgment. Judge Biunno, on July 14, 1975, granted the appellee’s motion in arrest of judgment.
¶3In reviewing an appeal from a trial court’s granting of motion in arrest of judgment, we must determine whether the evidence offered by the Commonwealth was legally sufficient to support the verdict. Commonwealth v. Froelich, 458 Pa. 104, 326 A.2d 364 (1974). To reach this determination, we accept all of the evidence and all reasonable inferences therefrom, upon which the fact-finder could have based the verdict; we can affirm the granting of a motion in arrest of judgment if, viewed in that manner, the evidence was nonetheless insufficient in law to find guilt beyond a reasonable doubt as to the crimes charged. Commonwealth v. Blevins, 453 Pa. 481, 309 A.2d 421 (1973). We must view the evidence in the light most favorable to the Commonwealth. Commonwealth v. Hazlett, 429 Pa. 476, 240 A.2d 555 (1968). Our task is the same whether the finder of fact was a jury or a judge sitting without a jury. Commonwealth v. Meadows, 232 Pa.Super. 292, 331 A.2d 827 (1974).
¶4In the instant case, the record, in the light most favorable to the Commonwealth, shows that in late February, 1974, a woman was attacked during the late night hours on an elevator in her apartment house. Her assailant grabbed and hit her and then raped her. Her assailant fled with her wallet containing some twenty-five dollars ($25.00). Tests and treatment in a hospital after the attack showed a presence of spermatozoa in the vagina of the victim. Nobody was apprehended for the crime until June 29, 1974, more than four months after the incident. On that date, the victim saw the appellee on an elevator in her apartment building and summoned her family members who detained the appellee.
¶5*37 At trial, the victim positively identified the appellee as the person who had attacked her. The lower court granted the motion in arrest of judgment primarily because of one aspect of the identification by the victim. Just after the attack the victim told police her assailant had blemishes or acne or pockmarks on his face. However, the lower court, in its Opinion in support of arrest of judgment, said:
“In the present case, the basis for the Court’s granting of the Motion in Arrest of Judgment rests fundamentally on the fact that observation by the Court at trial and observation under better lighting conditions at argument on the Post Trial Motions, disclosed that the defendant was smooth skinned and had no pockmarks, acne or other facial blemishes or residual scars therefrom.” (Emphasis added.)
¶6In this case, where trial and post-trial motions took place over a year after the crime charged, we cannot affirm the rationale or disposition by the lower court. Facial blemishes or acne can certainly disappear over a year’s time, but that fact alone does not lead to our conclusion. The trial record shows positive identification of appellee by a witness who obviously had an excellent opportunity to view her assailant at the time of the attack. Such positive and unshaken eyewitness testimony has been held sufficient in numerous cases to support convictions. See Commonwealth v. Hickman, 453 Pa. 427, 309 A.2d 564 (1973); Commonwealth v. Kloiber, 378 Pa. 412, 106 A.2d 820, cert. denied 348 U.S. 875, 75 S.Ct. 112, 99 L.Ed. 688 (1954). We therefore hold that the evidence supporting guilt was sufficient and the grant of motion in arrest of judgment erroneous as to the robbery and rape charges.
¶7 The appellee raises the additional contention that the Commonwealth has waived its right to appeal the order arresting judgment having failed to file any written response or make significant oral argument in *38opposition to the appellee’s post-trial motions. Cases such as Commonwealth v. Clair, 458 Pa. 418, 326 A.2d 272 (1974) are cited to support appellee’s argument. We cannot find merit in appellee’s waiver claims.
¶8All of the cases which deal with the waiver concept direct themselves to the duty of a party to: (1) follow our procedural rules
¶9The Order granting the motion in arrest of judgment is vacated and the verdict reinstated. The case is remanded to the trial court for sentencing.
¶10. See, for example, Commonwealth v. Blair, 460 Pa. 31, note 1, 331 A.2d 213, 214, note 1 (1975); Commonwealth v. Clair, supra.
¶11. See, for example, Commonwealth v. Mitchell, 464 Pa. 117, 346 A.2d 48 (1975); Commonwealth v. Clair, supra; Commonwealth v. Reid, 458 Pa. 357, 326 A.2d 267 (1974).