In JC's scan of the St. Etienne proof house marks, the mark of "superior proof of finished guns to[?] the live powder without identification" is two arrows or shishkabobs. What is "without identification"? The powder used in proof? Makes no sense as my Ideal is stamped with these arrows followed by PT (powder "T") on barrel flats and water table. Does this point to 2-pipes' scenario of a generic/perhaps bp perhaps not/as long as it produces the required pressure proof load or is poudre T the proofing powder? Gun also marked "pression 1100 kilos" which I take to be 1100 BAR. This 1930s Ideal should have a higher service pressure than the current 800 BAR proofed CIP guns, should it not? What would that service pressure be (with of course the usual nod to safety in "old" guns?
jack
