hifi engine

Aiwa AD-M100K cassette deck

I'd be grateful for any available information on this hi-fi deck - looks like 70's manufacture, mechanical operating keys and mostly discrete components (two LM chips on piggy-back boards). Single sided phenolic PCB, electromechanical VU meters, two head transport with mechanical full auto-stop, mechanical tape counter. Has four belts (1 flat, 3 square section) which need replacing - I have dimensions and they are OK to fit, but it would be nice to have a spec. Searching the internet seems to always draw a blank.

UPDATE: I just found that by adding AD and removing the K, I get lots of hits....but still happy to hear from anyone with info or tips.