Read in between the lines for me.

[englishman_ca]

No, not a social insurance number.


Tis on the face of the butt plate at the edge. Very neatly don, very discrete electro pencil 'M1.1088'.

Could be museum inventory number. Could be a collection id number. Could be many things.

Just surprised that a museum would let recorded historical info wither. All will be history once the records are destroyed.
At one time they thought that the carbine was worthy of exhibiting. But if they dont have the resources and somebody to find the records and look it up, I can understand. Most small museums are run on a volunteer basis.

The trail has gone cold, we will never know.