7.62 No4 MKI conversion question

[enfield303t]

I suspect it is not a DCRA conversion, but a gunsmith special using a Canadian Arsenals 7.62 barrel. DCRA conversions had a new serial number stamped onto the top of the bolt handle and a matching number stamped onto the receiver's right side just behind the barrel. A number of CA barrels were sent to England. It looks like Parker Hale got hold of at least one of them.

I know I am not a expert on Lee Enfields but can't imagine a gunsmith building this rifle as after seeing #12 and #40 personally and pictures of #692 which all have the identical markings he would have been the busiest gunsmith in the world. I do feel fortunate to have this rifle and know it is being treasured by my son and I.