Does this mean nickel ( chrome) lined?
Would this barrel marking only appear in post war guns?
Best Regards,
JBP

Not really sure of the year, but that is just advertising by Cap or Fallas as seen as a trademark of a 3D vector or rhombus with letters N-C-C(??) within....


Note on last example here on info on Forgeron:

http://littlegun.be/arme%20belge/artisans%20identifies%20e%20f/a%20forgeron%20gb.htm

Serbus,


Raimey
rse

Thank you Raimey,
It appears these barrels were made by Jean Falla. I thought that the mark may have been Jules Bury, but his marks usually appear on the receiver flats, rather than the barrels.
Any idea how the steel quality would be compared to Boehler or Krupp offerings of the same era? Do you know of any charts that may indicate tensile strength comparisons?
Best Regards,
JBP

Joseph Cap was a gun and barrel maker
http://www.littlegun.be/arme%20belge/artisans%20identifies%20c/a%20cap%20joseph%20gb.htm

I don't know from whom he sources his steel, but likely Acier Cockerill

Jean Falla used his steel, and also Poldi. He was registered 1931-1953
http://www.littlegun.be/arme%20belge/artisans%20identifies%20e%20f/a%20falla%20gb.htm



So it was Nickel Steel, likely AISI 23XX. I have no information regarding actual composition however.
Krupp Nickel Steel was patented in 1890 and had a reported tensile strength of 92,500 psi. The composition of Krupp gun barrel nickel steel may have changed over the years.
The pre-1920 Winchester Nickel Steel specimen I tested was non-standard AISI 2340 (just slightly low Ni and Mn) with a tensile strength of 124,000 psi. Impressive stuff.

In general, like Damascus, the quality of the barrel steel is reflected by the overall quality of the gun. High $/Franc guns were fitted with high $/Franc steel barrels.