been a bryant tech for 15 yrs.....never heard of those models.....
all carrier products have first four numbers of serial for week/year of mfg.
The numbers were odd to me. I brought the data plate home. Those are the numbers. I'm thinking the singer is the 60's and the bryant the 70's.
The guy wants this one repaired. Compressor runs maybe 15 seconds and shuts off. There is a copper stub coming off the side of the top of the compressor, that goes to a piece like a ballcock on a toilet. it stands about three inches above the compressor.Never seen that .
I believe what you have there is a 3 ton unit. Late 80's I had a one with a bad compressor. Carrier no longer had a compressor for it. After some research we were told we could drop in a r-22 compressor and refrigerant. It worked without any problems. Pressures were similar to other r-22 equipment at the time. You could probably repair this unit, but......it is not a 55 chevy.