Relatively low dates in Swiss 7.65 Para (M03), in years past, have not been impossible to find. I don’t have any as early as Duqjans’ T 11 T 02, but I do have the following in my own collection. I don’t collect this caliber by dates, not even years, but do for all other differences, no matter how minor.
B 7 T 14
D 4 T 29
K 3 T 04 (My earliest headstamped Swiss round)
T 8 T 09
W 8 T 07
M 10 T 42 (Probably shouldn’t have included this one, since it is atypical, having and aluminum case)
Cattle Killer (pointed lead bullets - reloads found with about any Swiss older headstamps"
T 3 T 07
W 7 T 07
Blank - extended neck with rosebud crimp:
T 12 T 08
Dummy - smooth case cannelure painted black, Snapped primer:
T 4 T 06
I also have a ball round, Swiss early characteristics, with no headstamp. I got this from, as I recall, Werner Schaltenbrand, of Switzerland, with the remark that it was a “very early” Swiss 7.65 mm Para round. I have never found any other information on it, so can only go by what he said. Don’t know if it is right or wrong. Werner (R.I.P.) was a knowledgeable collector and student of Swiss ammunition, so I am inclined to believe it is a pre-1903 cartridge.