Can someone tell me about this magazine?

[LU1900]

Originally Posted by P. J. Heck

Seems the 1935 GNRs that I have seen have an aluminum bottom on a shiney tube. The 1906 Portugese had a shiney tube & wooden bottom. I dont think this one is either, obviously been tampered with so ....very hard to tell what it was. PJH

It is know that those mag are for GNR , make by portugese arsenal
The K10 and 19 in cercle are the commun mark , same on the rods used for the GNR .