Please identify these NOS 6550s

Obviously one of those tubes is a GE that's the brand. I am not sure on the other tube. If you're trying to assemble a matched quad you need to get them tested and see how closely their parameters match.

I believe the logo on the first one is  Shuguang. Because they are at least 20 years old I wonder how they compare to a current batch?

I wouldn't bother. A new set of 4 matched 6550/KT88 run $120-$200 JJ/Tung Sol/Gold Lion. 

I hear you....but I hate for stuff going to waste.

would agree with @jond , get them tested before you do anything. no point in using your amp as a tube tester. a 20 yr old Shuguang is going to be good for the trash,  likely not good for normal use......that shuguang was made back when  you had a 50/50 chance a new shuguang would go super nova on you on power up. 20 year old chinese tubes are well known for their high failure rate, especially in something that runs high B+