FWB 300 unusual barrel stamps

I have a 1969 production FWB300 (non S) with unusual markings, stamped before the receiver was blued. What do these mean?

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The Pentagon F means sub powered like uk, German airgun power laws them coat of arms ones beside that no clue but gives me rain day thing to look up and see out of intrest.

Email that picture to them for a history reply on that..

On the his one the "F" is at the end of the stencil and no coat of arms looking ones

https://airgunwarriors.com/community/airgun-talk/feinwerkbau-300-information-value-sell/.

Maybe your is a rare one of a kind run?😉

I looked ah plenty and none close to your markings..lol. Id shoot them a email eith the pictutes and let there historian reply to what you got. Then you know 100% fur sur.

Im wanting to know now..
 
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The F is called a Freimark, which means it is legal to own for a citizen in Germany.
The middle mark means that the barrel or receiver was proofed in the Munich proof house.
The 19 one is a date code from the Munich proof house denoting the date of proofing.

I have no idea why it is 19 instead of 68 or 69, which would be in keeping with date of manufacture.
Perhaps someone had the rifle proofed at a later date?
 
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