Yep, an early one too. It has the fins at the chamber end of the barrel, and the early butt-stock. My books say "over 40,000 made.
A well liked gun, a bit heavy at almost 9 1/2lbs.
The cobbers had a fair-dinkum one there, right Bruce?
(please ignore bad spelling in the above, my spell checker has no "digger" spell check option, I'll have to go to the Big Smoke and buy a better one)