"There is some confusion in different sources about 'Yak-1M'."
Not really-- there is just a lot of poor, outdated material still floating around. The only two aircraft that were named "Yak-1M" were prototypes of the Yak-3 built at Saratov during 1943.
The model of the Yak-1 with a cut-down rear fuelage, new armament, and other sundry changes had no official designation other than "Yak-1". It was known as the Yak-1 s uluchshenniy obzorom, bronirovaniem i voorzheniem at the Factory, and was usually referred to as "Yak-1b" by the VVS (but never by the Government). This model started manufacture from Series 99. The absurd RAF camoflage shown in the above Polish source shows its age clearly, while the line drawings are much later from AJ Press.
"Between the stock Yak-1's and those made by good people of Aviaskins, the entire Yak-1 range has been well covered. We already have them all save for a few oddballs and prototypes."
Has anyone made a new 3d rear fuselage for the 'usual' Yak-1 with the half-round windows aft of the cockpit? I have searched and searched and never found such. This is the typical Yak-1 arrangement (not the clear rear section) as seen from Series 49 onward. For correct skinning, this version is most desperatey needed!
Help!