Jeff
I don't think I recall that you posted barrel length; but from the shape of the breechballs, I would assume that they are at least 30". If you look at the bottom of the barrels just ahead of the flats; you should see the Krupp trademark and two stamps, one of which will be a number stamp which I think is an indicator of barrel weight (just my theory, the other is the barrel borer's mark I believe; again, my theory, and most often will be a "J"). Generally heavier 12-bore guns will have a "2" stamp; the heaviest 12-bores will have a "3" stamp (and are usually 32" tubes), and the lightest 12-bores will have a "1" stamp (and graded guns often feature a "flattened" breech ball treatement that lightens the gun a bit more; I have never seen this feature on a SAC gun with 2 or 3 marked barrels). If the ejectors are not working at all, I would suspect some parts may be missing; possibly the coil springs, but I have seen some examples with the entire mechanism removed from the iron. The lever you noted is the ejector on/off switch; assuming it was in proper working order, lever forward disables the kickers and converts the gun to the extractor mode; lever rearwards engages the kickers and converts the gun to the selective auto ejector mode (the words "ON" and "OFF" should be engraved on the escutcheon to indicate selection to the shooter). As to the top lever spring, it is likely just weakened with age and needs to be replaced. The top lever spring on a SAC gun is a "V" spring type, is a little small (in my opinion) for the purpose; and it is not uncommon to see surviving examples with broken and very weak top lever springs. My purpose for requesting the serial number and frame bottom photo is to determine wheather or not the barrel lug has the sliding cocking plate; this feature would date the gun to mid-1903 or later. This feature is typically found on guns above serial number 33xxx; but SAC guns weren't always built in number sequence, so I have found many instances of feature overlap. As to a value, why not PM me with a telephone number; I will call at your convenience and we can discuss. Tom