US Manufactuer "F.S.C."


I have a 1.1" US Navy AA gun case with the maker’s mark “F.S.C.”. Does anyone know what company used these initials?

Thanks in advance for any info.



US manufacturer symbol FSC stands for “Fucton Sylphon Co.”

Best regards,



Thanks Rob, do you know where the company was located?


From: Heritage Research Center Web Site
WWll Industrial Facilities: Authorized Federally Funded Facilities
Fucton Sylphon Co.
Knoxville, Tennessee
Cartridge Cases & Fuzes


Thanks Frank.

  • @ Falcon: I would like to mention that the mark “FSC” can be also found on some 20mm Oerlikon ‘S’ Mk2 brass shell cases (20X110RB) manufactured in USA in 1942-43 by “Florence Stove Co.”, Kankakee, Illinois. Liviu 10/18/09


Did Florence Stove Co. only produce the cases in 1942 and 43?

My 1.1" case was made in 1941. If they only produced cases in those 2 years, this would rule out any possible confusion.



“Fucton Sylphon Co.” (FSC) produce in the period 1941-1944 a large number of 3" 50Cal. brass cartridge cases for the US Navy.

Best regards,