I have a small Victor set with a 10Cuft Acetylene and a 20CuFt Oxygen. The O2 gauge is a Victor SR150CR.
I suggest you go with gauges the next size up, the SR250, is serviceable since Victor will not service/sell parts for the 150.
They will however warrant it for a year then tell you to buy a new set.
Here is the set similar to what I have and it is nice and light, but the cutting torch is deceiving. It looks DINKY, but it can cut like torches twice its size.
One last tidbit. Watch out if buying a used set. The tanks are only certified for 10 years. I got lucky. Mine were dated 1986 and I was able to exchange mine out for $35 filled. $10 O2 and $15 Acetylene)