To Newf re "Falling Block":-
You have an early production D. & J. Fraser .450-3 1/4" BP Express sporting rifle, undoubtedly from Fraser's earliest production run, which was probably supplied to a Newfoundland distributor for seal hunting (See my article in the Journal of the Historical Breechloading Smallarms Association, Vol. 3, No. 9, pages 2 thro' 8; and Vol. 3, No. 10, page 63 Addendum; back issues of which are available from the HBSA website (UK), under "Publications").
From your photos I note that you are missing the latch mechanism at the end of the side lever which locks the action closed.
These actions are usually only serial numbered on the internal parts with Fraser's Total Production Serial Number in his "Sporting Rifle Series", which is also marked on the bottom of the barrel next to the action. The barrels were usually supplied marked "A & T" (Adams & Tait, gun-barrel riflers of No. 1, New Buildings, Prince Street, Birmingham, and will usually carry a larger four digit
"A & T" serial number stamped on the bottom of the barrel further towards the muzzle.
Further to Harry Eales comment that Webley manufactured actions for Fraser, I would like to ask if he has any documentary evidence or proof of his statement.
In my book "The British Falling Block Breechloading Rifle from 1865" I had quoted Daniel Fraser's younger son as stating that his father was very proud of the fact that his whole manufacturing process was completed under the one roof.
It is my belief that the only major, bought-out, manufactured items used by Fraser were those "A & T" barrels, and that those were only used in his earliest single barrel production, before he began making his own barrels.
Jonathan Kirton, Canada
