Life of an 18 Pr Case
A chum recently asked me to decode the markings on an 18Pr case. It is a busy set of markings and I offered the following explanation, feel free to criticise:
18 Pr over a I - Equipment designation and Mark of cartridge case
U in a circle - Annealing has been omitted in one repair
A in a circle plus 4 dots - Case has been annealed for four repairs
C3 & E38 Year letter and batch number of annealing (see also D16)
RL Royal Laboratory (Cartridge Factory), manufacturers of case
MN SL CS Contractors/station carrying out each repair
FFFFF five subsequent full charges filled (one each repair)
Broad Arrows under Fs Inspection acceptance after each repair
CF First full charge of Cordite
S plus 2 dots Case passed Scleroscope (metal hardness) test during two repairs
1906 Year of manufacture
D16 Year letter and batch of one annealing (see also C3 & E38)
Segmented Circle Case condemned (after a maximum of six full charge firings)
Arrow 2 and date 2 5 06 Original acceptance inspection mark and date of inspection
[References: Treatises etc., of Ammunition (Land and Naval services)]
A chum recently asked me to decode the markings on an 18Pr case. It is a busy set of markings and I offered the following explanation, feel free to criticise:
18 Pr over a I - Equipment designation and Mark of cartridge case
U in a circle - Annealing has been omitted in one repair
A in a circle plus 4 dots - Case has been annealed for four repairs
C3 & E38 Year letter and batch number of annealing (see also D16)
RL Royal Laboratory (Cartridge Factory), manufacturers of case
MN SL CS Contractors/station carrying out each repair
FFFFF five subsequent full charges filled (one each repair)
Broad Arrows under Fs Inspection acceptance after each repair
CF First full charge of Cordite
S plus 2 dots Case passed Scleroscope (metal hardness) test during two repairs
1906 Year of manufacture
D16 Year letter and batch of one annealing (see also C3 & E38)
Segmented Circle Case condemned (after a maximum of six full charge firings)
Arrow 2 and date 2 5 06 Original acceptance inspection mark and date of inspection
[References: Treatises etc., of Ammunition (Land and Naval services)]
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