My brother also owned one of these, probably purchased sometime in 1978 from Highland Appliance in Lansing, MI.
The RT-1011 was introduced in 1974 and was Pioneer's most affordable open reel-to-reel tape deck with a list price just under $600. It was a three head/four track deck that could take the larger ten-inch reels. It was equipped with three motors and the reels were belt driven. All Pioneer's open reel decks manufactured between 1973 and 1975 employed synchronous hysteresis motors. The frequency response was 30-20K Hz. The RT-1011 can be distinguished from the RT-1020 at a glance because the former used black plastic knobs and toggle switches but the latter used machined aluminum pieces. The RT-1011 remained in production from 1974 to 1978.