Made in 1951 and only one sample been made. Serial number 001. The length of case is very interesting - 80 mm (neither 76 mm (3") nor 89 mm (3 1/2")). One more interesting thing is proof marks absence and probably it could be explained by no such standard caliber as 8G-80mm at the time and still today laugh Factory new condition, barrel length 99 cm (39"), weight 5 Kg (11 pounds).
BTW its for sale and for about $5 grand. If somebody is crazy about big bore guns, I can give seller contact info wink



Geno.