No, not the magazine Record Mirror. This was a promotional item given by an RSO music rep to the music director of WLKI in Angola, Indiana, along with 25 copies of the soundtrack album to give away as contest prizes. It was on display as part of his enormous album collection for over 35 years. (No, he didn’t die! Just decided to whittle his collection down a bit.)
It is indeed a mirror, about license-plate size, with “TIMES SQUARE™ | RSO™ | ©1980 BUTTERFLY VALLEY NV” screen printed on it. The frame is plastic (and slightly warped), and the backing is corrugated cardboard; it is just a promotional freebie, after all. There must have been hundreds of these given out. There were also t-shirts and buttons made; the buttons turn up every so often, the t-shirts less so (and always in “small”), but before finding this I had no idea the mirrors existed.
promotional material : AAT ID: 300249572 : 20.5 x 26.8 cm. : 1980 (work);
Times_Square_1980 Promotional Mirror_layers_1080px.jpg
863 x 1080 px, 96 dpi, 491 kb
Times_Square_1980 Promotional Mirror_2_1080px.jpg
1033 x 1080 px, 96 dpi, 553 kb (images)
Times Square ©1980 StudioCanal/Canal+