No4 Based Trainer Help

[Brian Dick]

I don't think it's a Royal Navy conversion as done by PH. I've had a few and still have one that's on my knees as I sit here. It's marked as follows on the left side of the body. As Roger mentions, the left side butt socket markings are all linished clean. The rear sight should also have 25 YDS engraved on the left side of the slide with the datum marks on both the leaf and slide.

.22 R.F. N.9 MkI
P-H'59 A2391