Roy, no I'm not disapointed or suprised. I guess that affects the value quite a bit, my brother will be disapointed though. He thought it was worth 2 or 3 thousand.
It also has a 12 in the diamond next to the 14 and the 12 has a C under it. Kinda hard to see. I thought this might mean choked 12 ga. If it was originally 14 ga, then someone bored & chambered it out to 12 at a later date. I doubt that because the muzzles look to be the right thickness for a 12. The barrels are original to the receiver, as all the numbers match.
I actually had a high end German gun at one time that appeared to be a 14 that had been bored to 12, because the bore and chamber cast indicated this. However, I later found that the maker had a whole line of proprietary shotgun chamberings just like a lot of german rifle and drilling builders. One they pushed was a 14 bore with a cartridge very clos to a 12.