One of two home produced armored vehicles. The TK-3 was a development based on the Vickers Carden Loyd machine gun carrier. This was the first tank ever produced by the Poles. Units were produced with either a Ford or a Fiat engine. Variations of this tankette were produced with a 20 mm (13/16 inch) cannon (TKS). There were experiments done with a 37 mm (1.5 inch) cannon (TKS-D), but that design was never officially adopted. A model TKF was developed to give the tank better range, a 46 hp Fiat motor and 1 heavy and 1 light machine gun. Engineering developements included a special trailer, towed behind the TK3 that allowed the TK-3 to drive up to, connect it's power train, and drive down the road like an automobile!
| Crew | 2 |
| Engine | Ford or Fiat, 40 hp |
| Weight | 5,358 lb |
| Speed | 28.5 mph |
| Range | 75 miles |
| Main Gun | 7.92 mm (6/16 inch) machine gun, 20 mm (13/16 inch) anti-tank cannon. Some prototypes had larger cannon, but were not produced in quanities. |
| Length | 8.46' |
| Width | 5.84' |
| Height | 4.33' |
| Armor | 4 - 10 mm (1/8 to 3/8 inch) |
