(https://1.bp.blogspot.com/-_-aReT-aZ_U/X-J1AvXmYyI/AAAAAAAAW2E/V_kZMpJcXaIRzL95o2XrtWSO6qk-DqQ2gCLcBGAsYHQ/s16000/2020-12-23-Pz1F.jpg)
The Panzer 1F had almost nothing in common with earlier versions of the Panzer 1 except that it was small and armed with two machine guns (MG34 in this case, rather than the MG13 of earlier models).
It was intended as a very heavily armoured infantry support assault tank. Few were made; the concept was fine as far as it went, but by that time an infantry support tank needed more firepower than a pair of machine guns could provide. Some did see action on the Leningrad front.
They first appeared in the Grey Years, but I've painted this one in post-mid-'43 dunkelgelb. They would have been in 3-colour camo, but I find that painting disruptive schemes on very small vehicles tends to submerge their details too much (as it was intended to do, I suppose).
This little 1:100 scale (15mm) model is only 43mm front to back, and was printed on my Ender 3 from a model by TigerAce1945 (Zachary Kavulich).
It's really pushing the edges of the envelope for my now elderly Ender 3 with its 0.4mm nozzle. I really am going to have to get a resin printer one of these days.