"I dunno! It worked before I got here!" -Beans Roontash
Resident Amp Guru - Wild Bill - may know something about these.
Nope! 'Fraid not!
If memory serves, Olson was a electronic catalogue house rather than a speaker manufacturer. So somebody else made it and Olson just put their name on it.
If you look around the speaker rim or on the back of the cone you may see some numbers like "67-6628" or "220-6734". These are codes from the actual maker. The first would mean "67" for Eminence and "6628" would mean it was made in 1966 during the 28th week. The second would mean Jensen, 34th week of 1967.
You can look up speaker mfg codes at http://www.webervst.com
or if you find some on the speakers just check back here and I'll look 'em up for you.
What the heck, I'm sure Ted Weber won't mind if I steal his copy!:tongue: I'll just paste it here for everyone!
24 Becker 277 Emerson 748 Russell
67 Eminence 280 Raytheon 756 Universal
101 Admiral 285 ROLA 767 Quincy
119 Automatic Manufacturing 286 Ross 787 Sonatone
125 Bendix 296 Solar 789 McGregor
130 Matsushita 308 Stromberg 794 Harman Kardon
130 Panasonic 328 Utah 795 Atlas
137 C.T.S. 336 Western Electric 828 Midland
145 Cinaudagraph 343 Zenith 840 Ampex
145 Consolidated 371 Best 847 University
150 Crescent 391 Altec Lansing 918 Oaktron
169 Hitachi 416 Heath 1056 Fisher
185 Motorola 433 Cleveland 1059 Channel
188 General Electric 449 Wilder 1098 Pyle
220 Jensen 465 Oxford 1113 Acoustic Fiber Sounde
232 Magnavox 466 Delco 1149 Curtis Mathes
240 JW Davis 549 Midwest 1191 Micro Magnet
245 National 575 Heppner 1279 WeberVST
252 Operadio 589 Bogen
252 Dukane 649 Electro-Voice
260 Philco 706 Pioneer
270 Quam-Nichols 719 Carbonneau
274 RCA 742 Esquire
277 Radio Speaker
These numerical prefixes are called EIA codes, from "Electronic Industries Association". Pretty well all parts had such codes. They are a great tool to figure out which company made that great output transformer in your 1964 BF Twin Reverb or whatever. The last part of the number helps to date your amp. If the vol/tone controls have a code telling you they were made by CTS in the 30th week of 1962 you can bet that your amp was build within a few weeks of that point. Manufacturers can never afford to let parts inventory get old when they have to pay the bill within 30 days. So those pots came in the Fender door and likely were put into an amp very quickly. The sooner the amp was shipped to a dealer the faster Leo received his money so he could pay the bills and feed his kids with what was left over.