20 X 138B Finnish headstamp

[Orita]

- I have a Finnish made 20X138B brass shell case which I think it was fired by the 20mm Lahti Mod.39 anti-tank rifle. My picture showing the impressed headstamp markings for this 20X138B shell case manufactured in Finland will be posted below by "dano1917". Starting clockwise from the 11 o'clock position, the headstamp markings are: "circle with 2 crossed arrows" (acceptance mark), "20/40" (caliber - 20mm and shell case model - 1940), "T" (maker's mark, Tikkakoski arsenal), "41" (two digit date of manufacture, year 1941) and "E4" (delivery lot). Note that a small oval mark overlaps the number "2" from the "20/40" stamp [my photo is clear enough to see this]. The head of this 20X138B shell case has a diameter of 26.9mm [1.059-inch]. Around the 1 o'clock position there is a very deep mark left by the ejector and around the 6/7 o'clock position the rim was deformed by the extractor during the extraction and ejection process. Orita 07/16/09

 

[dano1917]

Finnish headstamp

Headstamp photo per orita request