I have a Faz built on a No.1 MkVI body. It is dated '41 on the butt socket
and '42 on the barrel, along with the serial number. The finish is rough like
the subject rifle and similar to the pictures of several other No.1 MkVI
bodied rifles I have seen on the Lee-Enfield forums. Mine, however, does not
have a magazine cutoff slot. Also, the bottom of the butt socket has the
marking SBN 8. I cannot find any marking as to the rifle type, just R O F.
Some I have seen were roughly marked No 1 MkVI. It has been machined
for the later plunger and spring rear sight.

This is the only example of a Trials body used in a Faz No. 4 Mk I rifle I have
seen reported but there are more out there to be found.