Although there were plenty of market-related versions of this generation of decks, the TC-229SD seems to be a really rare one.

Inheriting the transport keys' design of the ELCASET decks (and even the RM-30 remote control), this was no masterpiece (neither was it meant to be) but a huge and very sturdy deck from the mid 1970s : two F&F heads, one DC Servo motor for the drive and one AC motor for spooling, switchable MPX filter, a limiter, FeCr compatibility and -hign-end- a Rec-Mute switch.

Later on upgraded as TC-K7 (B, II, BII etc) and TC-K8B - serious, no frills, indestructible.