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Webcentimetre, for example 900 or 1,200kg. These were the standard and magnum proof pressure values respectively. Alternative imperial proof marks introduced in 1954 gave service pressures in tons per square inch, marked as ‘3 tons’. In the case of the Birmingham Proof House, this was marked as ‘3 tons per square inch’ until 1954. WebBecause many rifles may have been imported or, prior to sale on the civilian market, have only had military proof marks, then dating from the Birmingham or London Proof House marks needs to be treated with a … ionas kitchen

Firearms & Ammunition Testing Birmingham Proof House

WebThe Birmingham Proof House, Banbury Street, Birmingham, B5 5RH. England. Telephone 0121 643 3860 WebCIP, London & Birmingham Proof Houses’ Barrel Proof Symbols Equivalency Table For Use with Steel Shot Ammunition CIP/UK STANDARD SUPERIOR STEEL (HIGH PERFORMANCE) *Please note the British Proof Authority will not give guidance on pre-1954 marks and recommends re-proof of such arms. Use of Steel Shot Ammunition Websince 1670 London view mark since 1904 Birmingham view mark PROOF MARKS: BRITISH PROOF MARKS - ENGLAND, cont. 2152 PROOF MARKS: ... PROOF MARK CIRCA PROOF HOUSE TYPE OF PROOF AND GUN since 1952 Ulm since 1968 Hannover since 1968 Kiel (W. German) ... Created Date: 3/18/2008 11:09:01 AM ... ontario fish and game login