The TK.1 was designed from a British Vickers Carden-Loyd Mark VI tankette. This lead to the TK.2 and the heavier TK.3.
TK / TK.3
Had an enclosed superstructure. Had heavier armor than the TK.1 and TK.2. 7.92 mm MG was mounted in the right front of the hull.
A four wheeled trailer was built that the TK.3 would tow across country, and then once reached a road it would climb onto the trailer and then by removing the tracks it could then be driven.