Officer Wool Pilotka (1940)? Dated

[SackDaddy953]

Hello! I recently bought this 1940-dated officer wool pilotka from Zemylanka and have been receiving mixed results about the stamp that is present on the pilotka. The stamp is supposedly dated 1940 from the Clara Zetkin factory, or civilian maker, one of the two, and is a size 58. There is also the number 7, a few inches to the right of that stamp. I am worried this stamp is not original to the pilotka as I have seen a source that says that these wool pilotkas for officers were introduced in 1941, and I of course, have a 1940 stamp, however, I have another source that contradicts that, saying these caps were used in peacetime (pre-war) too.

Edit: Much better image of stamp is present here: Screenshot - 9b6a19d731ed4ec0068a72dcb2f08453 - Gyazo

[SackDaddy953]

Figured I'd post an update, two collectors said that this pilotka looks perfect, including Sergey from WW2.ru. As imagined, the pressure is finally lifted from my shoulders that this is a botched stamp. This would also likely imply that these caps weren't introduced in 1941 as stated from other sources?