This is a 5E3 Tweed Deluxe amp built by a very reputable builder in Southern California. It is made of Fender parts, although it was not built at the Fender factory. A couple things that make this amp unique are: the custom cabinet was made by Kerry Wright in Fullerton, California as was the cover. The oversized cabinet is for a Tweed Pro Amp which typically houses a single 15" speaker. The builder used an adapter baffle to mount the 12" Celestion G12M Greenback speaker.
The builder also used a Mercury Vapor Rectifier tube which gives the amp more clean head room.
The combination of this rectifier tube and the bigger Tweed Pro cabinet make this a very BIG sounding Tweed Deluxe.