Is this a Fender cabinet?

The speaker cabinet for my 1961 Bassman 6G6-A is 20" x 30" x 11.5", which doesn't quite match dimensions for any Fender cabinet I can find. Speakers are Oxford 12M6-1. It's well made, but could be some other brand in disguise or home made.Opinions and clever comments welcome.
Thanks
 

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Yea, somebody built that cabinet, but it's got the rough tolex, the maroon speaker cloth, tilt legs, maybe Fender corners.... It looks pretty good from 6 feet away.
It's from back in the day when that's what we did. I built a cabinet for my Silvertone Twin Twelve because the one that came with the amp was too small.