I've been thinking about a 41 for a while, and today I made arrangements to buy this set.
S/N a little under A600000, which I think points to about 1979. Shot some but not a lot, judging from magazine wear (it comes with two), and very well cared for.
Better pics coming in a few days. This is (I hope) my last bad cell phone pic. I expect to have a new phone by the end of the year that has image stabilization and better low-light image capture. It should produce more appealing grab shots.
That's not a red post sight; The previous owner just put some red paint on it. There's nothing on the sight on the shorter barrel, which looks like it was not used very much.