Any info on 16 ga

[Craig Cogar]

Hello guys- I am new to this forum and glad I found it- after 48 years and 100's of guns later I finally have grown up and now know what I like- these old shotguns are it- currently I have an old LC no.2(1901) 16 gauge- did some wheeling and dealing to get it- only thing I don't like about it is that darn trigger guard is reeking havoc on my middle finger when I shoot right barrel- anyway I am now in love with Parkers- have a friend who has and oldie that I want.. maybe depending on what you guys can tell me about it-
please help me identify all the stuff marked on this baby- I do not have the gun in my hands so I am trying to ask him and figure out what this and that mean.
on bottom of barrels big letters "USC Co. 10-5-92 #191." I cannot find what USC is for?? also a "0" on last lug
also a "C"

the serial# is 53938 above that is a 2
he said it is a 16 cause 12 to big 20 to small!
gun works great as far as hammers working etc.. the barrels he claims are smooth and clean- I would only want this gun if I could use it as I really don't want a wall hanger- can you shoot lite RST shells thru- that's what I use on my Elsie?

Thanks for any help you can give me.
FYI what I really want is a Parker 28 gauge single trigger anyone got one for about 5k???
thanks craig