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Thread: Byf 43 Letter Block question

  1. #1
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    Default Byf 43 Letter Block question

    I recently picked up a byf 43 but I'm not sure what this letter block code is. It almost looks like two individual stamped backward J's, or almost a U but they are not connected at the bottom.

    Any help is appreciated.

    Thanks,

    byf 43 Letter Code.jpg

    byf 43 Bolt.jpg

  2. #2
    No War Eagles For You! mrfarb's Avatar
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    Looks like LL, probably a byf43 receiver used in 1942 production, as by 1943 there were no double letter blocks and Mauser went to 5 digit.
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  3. #3
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    So would this be a very late 1942 assembled rifle?

    I was researching the letter blocks used by byf in 1943 and found the same, that's why I was wondering how the rifle could have a two letter code.

    I'll post some more pictures when I get a chance. It looks like an unmolested rifle with minimal wear, no import marks and all matching except the odd thing is the stock channel is numbered on less (7911). The rifle is numbered 7912 everywhere else including the upper handguard. I'm guessing it could have been misnumbered at assembly?

  4. #4
    Super Over the Top Moderator -1/2 bruce98k's Avatar
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    Default late byf42

    Yep very late 42 or early 43 production using byf 43 roll marked receiver.
    Neat variation.
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    RKI- Reasonably Knowledgable Individual heavy_mech's Avatar
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    Quote Originally Posted by bruce98k View Post
    Yep very late 42 or early 43 production using byf 43 roll marked receiver.
    Neat variation.
    Was there a slight 'roll over' where '43 receivers were used continuing the '42 numbering? It sounds like that's what I'm reading. Do you know how long they continued into '43? A week? Couple weeks? Seems it could have been chaotic.
    Last edited by heavy_mech; 10-14-2019 at 05:56 PM. Reason: spell check
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    Moderator² Loewe's Avatar
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    It began in the ff-block and becomes the norm by the kk-block (all known kk-LL blocks are byf/43's), - strange thing is it starts so much earlier in the ff-block, seemingly skips three whole blocks (gg-hh-ii) and then takes over. Of course I have only a flicker of a sampling compared to what was made, but to the degree it is complete it is consistent. 7912 LL is the highest rifle serialed in the byf/42 range that I have recorded, a modest jump from the earlier high, though "The Book" states 7996 LL is known.

    I agree these are neat, I also think these rifles, probably from the late ff-block on were made in 1943. No way to prove it though, trend characteristics do not change in any meaningful way late 1942 through 1943 and WMO was a prolific barrel producer so barrel trends offer no reliable data to speculate over...

    Quote Originally Posted by heavy_mech View Post
    Do you know how long they continued into '43?

  7. #7
    aka 8x57IS Stephan98k's Avatar
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    This 1942/43 transition rifle with serial number "7912 ll" is the highest rifle that I have recorded too.

    I assume these rifles were made still in late December 1942, the stock completion date code of an earlier "ll" block and other examples lead me to this assumption. It would be very interesting to know the stock completion date code from this rifle with sn "7912 ll". I guess the stock was completed in week 51 or 52 and has a code like "Ha 5 51 42" behind buttplate.

    Regards,
    Stephan

  8. #8
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    Thanks for everyone's input. I was on the fence about purchasing this rifle, glad I did now.

    I will remove the buttplate tonight and see what is there.

  9. #9
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    I removed the Butt plate and found the date of Ha 2 51 42.

    So 2nd to last week of Dec.42? What does the Ha 2 mean?

    byf 43 Stock Date (2).jpg

    byf 43 Butt Plate (2).jpg

  10. #10
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    Quote Originally Posted by tshorter View Post
    I removed the Butt plate and found the date of Ha 2 51 42.

    So 2nd to last week of Dec.42? What does the Ha 2 mean?

    byf 43 Stock Date (2).jpg

    byf 43 Butt Plate (2).jpg
    2nd day of the 51st week of ‘42. HA would be the stock supplier.

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