77,XXX puts it in 1932, batch made Feb to October (thanks Mr Gandy). This was a batch of IIs so it has not been modified unless it has a flash socket on back. Black is the usual colour for the year.
The lens is the earlier Elmar version without infinity lock and with infinity at 11 oclock rather than 7.. These usually do not have serial numbers. Doesn't look too good though!
So what you have looks like a genuine early Leica II with the right lens, a significant camera in that it was the first with rangefinder, but not that rare.
Does it have a flat small round smooth 'patch' on the back?
As to value, (I am talking in the UK) the lens is worth no more than a normal nickel Elmar in the same condition, the camera's value depends on top and bottom plate condition, vulcanite looks OK, and obviously the state of shutter/blinds and view/range finder. You need to see at least top and bottom pics. On Ebay, anything from £150 to £230 in good condition and that lens really doesn't look good so I would worry about what it is like inside.
Having said all that, if it were in the UK I would buy it simply because the II is a very nice Leica and from what little one can see it doesn't look like it has been messed around much.
With apologies for a purely personal point of view,
Michael
