1/4 track stereo format, 3 speed recorder 1 7/8, 3 3/4 & 7 ips. Reel tables have twist lock stems Super calibrated (for Maxell) machine on spec speed for 1 7/8 and 3 3/4, slightly 1% slow on 7ips. Excellent wow & flutter. All rubber good, all complete service & maintenance. #9 condition