Help! Arisaka T38,T99 and Mas 36 what is the date according to serial?

[tpipower]

Can you help me to find out the date with the serial below? Thanks!!!!!

First is A Arisaka T38 with ww2 feature like cupped butt plate and rear peep sight.

The T99 is early made, monopod, anti-aircraft sight and cromed bore.

The mas 36 is post war refurb. The serial is in K series. I suppose the receiver has been made in 1940 and assembled in late 1944, it also feature a type 2 rear sight. The late serial I saw on a 1940 mas 36 was K 26 ### !?

 

[Pblatzz]

T38 - Nagoya Arsenal, type 27 ? approx 1933- 1940

T99 - Nagoya Arsenal, Type 4, Made approx 1942 ish, 10,000-99,999 units made

MAS 36 is a K block made in 1939-40, The boxed C68 indicates it has been refurbished "as new" in 1968.