I didn't take note of the model number, and the scope doesn't have one on the front panel. It's one of Tektronix's low-end T900-series service scopes, but the T912 (10 MHz), T922 (15 MHz), T932 (35 MHz), and T935 (35 MHz, delayed sweep) all have similar front panels. Examining the photos on the TekWiki, this has delayed sweep and so is a T935 or T935A.