Japanese Proof

A thanks to my friend Felix for all information.

Do not use any information on these pages without checking if the information is correct.

If you find any errors or missing information please, please, please let me know by sending me a e-mail to:
Tobias(a)shotguns.se

Ongoing work, please be patient....

Japan after 1951

Mark	Proof house	Valid	Type of proof
	TBD	Since 1951	Proof for smokeless powder
NP	TBD	Since 1951	Pressure proof
	TBD	Since 1951	Proofmark for “all necessary tests are done”

Miroku has their own datestamp as two letters, the corresponding number as below:

Z=1
Y=2
X=3
W=4
V=5
T=6
R=7
P=8
N=9
M=0

As example RP means 1978.

Last update: 2023-07-01