Looks like it has ejectors to me (that's what my two Merkel boxlocks with ejectors look like). Sorry to hear that they're not working. One thing you could do is remove them by getting a very small (i.e., jeweler's type) screwdriver, depressing the ejectors, and then removing the stop screws at the end of the ejectors (beneath the kersten rib extensions). Be careful, there are springs beneath those ejectors, and they'll fly out, and you'll marr them up. Then you can clean beneath the ejectors and the springs, and they'll probably work good as new.
The Q1 is an East German proof mark. It means excellent quality. You can find out more about the proof marks on your gun by looking here:http://www.shotguns.se/html/east_germany.html
Your gun was proofed in February, 1961 (see the 261 above the Q1).
The generally accepted notion is that guns made pre-WWII had the best quality, but that the guns made shortly after the war were also extremely good, in not even the equal to, those made pre-war. Further, that by the 1970s the craftsman who worked pre and immediately post war were retiring, without many in the way to replace them. I've had a 1950 and have a 1952 boxlock, and the fit and finish were second to none. I've seen a 1930s boxlock, and really don't feel that it is any better. I've heard that the quality of the 1980s guns was spotty, and you had to really look at each gun individually. I have a 1969 Simson (made in the Merkel factory) side by side that is very nice, and the fit and finish is nice, but the stock and forend are from two different pieces of wood. I think generally the Simson counterparts were not finished to quite the same degree that the Merkels were, but I've seen some nice Simsons that you couldn't tell from Merkels. That's another story.
Your gun is a high quality but underappreciated piece. You will find, and probably already have, that it has a special quality about the way that it points. Enjoy it!