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Swedish 10,5 cm M/25 Ubatka

H

Hoeksel

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I have a WW2 dated Swedish shell case (105x540R) that is identified as a 10,5 cm M/25 Ubatka. Does anybody what gun this is? I can not find anything in my artillery books or the internet. And what does Ubatka mean?!
 
Just found a first reference to a Swedish 10,5 cm M/25 in "Naval Weapons of WW2"; a 10,5 cm M/25 L/41 QF was used on the Draken class submarines of the Swedish navy.

Just wondering...Ubatka is related to U-boat?!? Google translate states "submarine" = ubt......
 
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Thanks Tmine! Nice to see how Swedish looks like a mix of Germenglish with some Dutch ;-). I did some further searching and I think I figured it out by combining some references.

On reference http://en.wikipedia.org/wiki/Orzeł_class_submarine it is stated that Holland made submarines for Poland (Orzel class) just before WW2, and installed the 10,5 cm M/25 Bofors (the Polish sank 1 of our subs by accident.....). The Dutch themselves installed 8,8 cm Bofors guns on their submarines, so Bofors would be a sensible choice. More info on the armament of both on www.dutchsubmarines.com. My case is dated after 1940 so I can assume it is made by Sweden, for Sweden. The Swedish used the 10,5 cm M/25 on the Draken class submarines.

When looking for information I also found that Sweden had a 10,5 cm L/41 gun on their Arholma class minesweeper (12 pieces). reference http://www.navypedia.org/ships/sweden/sw_ms_arholma.htm. This type of gun is also seen on http://www.navweaps.com/Weapons/WNSweden_41-41_m1936.htm as both a 10,5 cm M/36 for Poland (Orzel class sub again!) and the 10,5 cm M/40 for Swedish Arholma class. So it seems the M/25 was renamed making it so hard to find any info. To finalize my case has a stamp that could well be interpreted as "10,5 cm M/40" meaning it was indeed made for the gun as installed on the Swedish Arholma class minesweeper.

Now that I think I have found the gun used for this case, I am interested in other headstamps for the 105x544R Bofors case.

Also, I still do not know the meaning of the typical Swedish "NJ" fishhook like logo. I have this logo on this case, a 37 mm AT case WW2 and a undated 25 mm Bofors case. I really would like to know the meaning and if it is used post-war or not (to date my 25 mm case).

Pictures from left to right:

- headstamp of my 10,5 cm M/40 Bofors case
- detail of headstamp showing 10,5 cm M/40 and unknown NJ logo
- Swedish 10,5 cm M/40 gun
- my 10,5 cm M/40 shell case
- Polish 10,5 cm M/25 M/36 Bofors deck gun on Orzel class submarine
 

Attachments

  • 10,5 cm M40.jpg
    10,5 cm M40.jpg
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  • 10,5 cm M40 headstamp.jpg
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  • Swedish 10.5 cm L41 M1940 minesweeper.jpg
    Swedish 10.5 cm L41 M1940 minesweeper.jpg
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  • The case.jpg
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  • polish105mmboforssubmarinegunorzel L41.jpg
    polish105mmboforssubmarinegunorzel L41.jpg
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