20x110 Hispano "BBC 1941 20mm"


#1

I think this is a 20x110 Hispano. What is BBC (outside of radio circles)?


#2

BBC = Bridgeport Brass Co. Bridgeport, CT (1941-1942)
M21 (20x110 Hispano)


#3

[quote=“sksvlad”]I think this is a 20x110 Hispano. What is BBC (outside of radio circles)?
[/quote]

  • @ sksvlad: To me it looks like a 20X110RB Oerlikon “S” shell case, not a 20X110 rimless Hispano. Please measure de head diameter: 22.1mm for 20X110RB Oerlikon “S” and 24.7mm for 20X110 rimless Hispano. Let me know what exactly you have. Liviu 04/11/11

#4

Diametre is 24.5mm, my manual calipres, I guess it is 24.7mm with better measurement. Here is a side scan.