Swiss K31 bayonet, from 1941?

[Vesqu]

This is my Swiss K31 bayonet which still has a belt attached to it as well. I was wondering, whether this bayonet is a post war one or not? The 41 on the leather probably means that the frog is from 1941, but the number that seems to be "66" on the belt is confusing me, did someone just put a post war belt together witha a 1941 frog? I found online, that the rifle with the serial number 640078 is/was from 1941, but I don't know whether these bayonets were made for the rifles with the same serial number?

[Vesqu]

Anyone got ideas on this one? I'd especially like to know whether the bayonet and belt are WWII era or not, thanks you beforehand!

[AndyB]

The bayonet is M1918 used on various carbines, M11 and M31 too, so Yours is serialed with 1941 produced rifle, the frog 41 could be date, or what other, anyway the bayonet could be made earlier as 1941. b.r.Andy

[glennsche]

K31 Serial numbers and dates:

Année Quantité No de série
(Year) (Quantity) (Serial Number)
1933 1193 520010-521202
1934 15534 521203-536736
1935 13664 536737-550400
1936 11326 550401-561727
1937 11639 561728-573366
1938 10344 573367-583700
1939 15300 583701-599000
1940 33575 599001-632575
1941 54150 632576-686725
1942 49350 686726-736075
1943 50475 736076-786550
1944 51900 786551-838450
1945 26200 838451-864650
1946 15600 864651-880250
1947 20950 880251-901200
1948 20100 901201-921300
1949 15500 921301-936800
1950 13200 936801-950000
1951 23050 950001-973050
1952 21400 973051-994450
1953 5549 994451-999999
1953 7450 215001-222450
1954 17150 222451-239600
1955 11250 239601-250850
1956 6400 250851-257250
1957 2950 257251-260200
1958 3130 260201-263330

Assuming that this bayonet was serialed along with a matching rifle, which i'm almost positive was done (ive seen matching k11s with matching bayonets, i dont see why the same wouldnt be the case with the k31s), then yes, the date looks indeed to be early 1941.

The belt looks like it dates from 1966, so obviously not original to the bayonet. the Frog looks legit tho!

nice piece.

[Aleksander P]

What do you guys think of this bayonet? Serial number seems low.

[AndyB]

Measure the barrel ring diameter inside, could be for other rifle or carbine as K31, or new serialed.b.r.Andy

[Aleksander P]

Measure the barrel ring diameter inside, could be for other rifle or carbine as K31, or new serialed.b.r.Andy

Thanks! Will do.