Hey, gang. Hope all's well. Have a near mint ~'66 Supro 24 on the bench. What an interesting and amazingly toneful amp! This one has the rare white tolex/vinyl covering over the cab. Can anyone help me ID the speaker date? It is a Matrecs Industries 12" with the following codes: Basket: 129C8W | 557 520 Cone: 3C0002G Any help would be appreciated. This amp is very mysterious for me. The construction is unique and very quirky. The lead dress is great and the layout is very tidy. Cheers! ~F Dovetail joint New Cathode R and rectifier protection diodes Original RCA tube compliment. OT wires soldered directly to speaker. Old lampcord replaced with proper 3-prong cord. Someone nipped the old bias cap.