I bought a Soldano 4x12 cabinet last year for $400, with Eminence Legend V1216s in it. I'm not sure if it's the S-412B Straight or the Lucky 13 412 Straight though. I don't know where the serial number is to check, or even if cabinets have one (do they?) There seems to be minimal difference between the two cabs, I just wanted to know what model it is, or how to find out myself. Thanks!

Cab in question:
That's the "regular" Soldano 412 cabinet that you would normally use with a SLO. The "Lucky 13" cab has a heavier build.
GMW hot-rod telecaster
GMW soloist
PRS Custom 24
The Illegal Les Paul
Soldano SM-100R
Splawn 4x12

“Life is on the wire…the rest is just waiting” - Papa Wallenda
Substitute the stage for the wire, and he's got it.