Will my rack mounted .50 caliber fit into Mark IV short cab?

[mesamark3]

I have a .50 caliber that is in a 19" rack mount unit. The amp itself appears to be 17" wide. Will this fit into an empty Mark IV short chasis combo cab???

 

[GD_NC]

Probably. Most of the old 80's 1x12" Mark & Caliber 18 3/4"w combos are the same size. Mark IIB, IIC, III and Mark IV narrow 1x12 cabs are intechangeable. You need to check the bolt spacing to be sure it will fit.

 

[mesamark3]

Unfortunately it's a no return item on ebay so I have no way to tell for sure. Maybe if I call Mesa?