The TK-3 was based on the British Carden-Loyd tankette, designed in 1931. An improved version, the TKS, had thicker armour.
The standard TK-3 and TKS were only equipped with a machine gun. The majority of Polands 575 TK-3 and TKS tankettes were therefore inferior to most German tanks and armoured cars. The tankettes were being upgraded to the 20 mm FK-A wz. 38 tank gun, allowing it to penetrate the armour of most German armoured vehicles, but only a few had been completed by the time of the German invasion.
Several variants were build on the chassis, most notably the C2P artillery tractor.
The TKS was exported to Estonia and Croatia, and a number of TK-3 and TKS were captured by Germany and used for occupational duties.
| TK-3 | TKS | |
|---|---|---|
| Crew | ||
| Crew |
|
|
| Physical Characteristics | ||
| Weight | 2.43 t | 2.6 t |
| Length | 2.58 m | |
| Width | 1.78 m | |
| Height | 1.32 m | |
| Armour | ||
| Armour (range) | 4-8 mm | 4-10 mm |
| Performance | ||
| Speed (max) | 46 km/h | 40 km/h |
| Engine | ||
| Engine | Ford A | Polski FIAT-122 |
| Net h.p. | 40 | 46 |
| Armament | ||
| Primary weapon | km wz.25 (1) | |
