My Parker Hale 3 band Enfield also has, very clearly marked on the lock ahead of the hammer:
"1853
ENFIELD"
The three is the type with a horizontal top so there is no way it could be a mis-struck eight.
Behind the hammer is a large crown about 5/16 inch high X 1/2 inch wide under which is stamped "P-H"
I believe this rifle is one of the First generation rifles totally made in England because I've had it about 6 years and the brass was naturally aged to the nice patina that brass gets from being around for years back when I bought it.
In addition to the "PARKER-HALE LTD. BIRMINGHAM ENGLAND" on the top of the barrel about 5 inches behind the rear sight is, as I mentioned above the crown over BP English proof mark. On the tang, just ahead of the rear tang screw is a very small, poorly struck crown over what appears to be a B. I believe this was supposed to be over a BP.
It's serial number is 301X if that's any help.
Just as a side note, my Parker Hale 2 band and Musketoon also have the same markings (although a bit clearer on the tang).
The 2 band lock is marked:
1858
ENFIELD
ahead of the hammer.
The Musketoon is marked:
1861
ENFIELD
ahead of the hammer
All three guns have the same large crown over P-H behind the hammer.
I might mention, none of these guns have a proof mark marked on the lock. This makes sense because only the barrel is proofed.
zonie