I just got done rebuilting this norelco 187 dictation machine, I need to know the history on this guy, Very well built machine all relay control no logic or any IC at all, uses very high quality transistors at least 12 which was unusually at it time, most recorders only used 4 total and three relay to electrically control the transport have electric erase head. Looks like it came out in late 60s to early 70s.

Norelco was the brand name for Philips dictation machines sold in the USA the 187 is a Philips LFH0187/15 here's a picture.The Philips version has sliders instead of pots but it's the same machine.