I thought it would never happen, but I found a 1964 Oxford 12K5-6 speaker for my 64 DR. I've been on the verge of buying an Eminence Allesandro GA-SC64 for the past couple months, but kept holding out, hoping for a period correct 12K5-6. This one popped up on Ebay last week on a 7 day auction. I messaged the seller and agreed on a Buy It Now price and bought it. 15th week of 1964 which is perfect for an amp made in May of 64. This one has been reconed which is fine with me. I'll be making an appointment soon with the restoration dude to have the baffle built and grill cloth installed.
The seller is a woman whose husband built effects pedals and owned a vintage music store. He passed away about 10 years ago, and she's starting to sell all his music stuff she's had in storage. When she shipped the speaker, she packed it with a bunch of pages from a 1997 Vintage Guitar magazine. I'll post a couple pics of some of the ads in the guitar thread just to remind y'all how much the prices have gone up on vintage guitars over the past 22 years.