I have 6 Quad 405 clone boards if anyone is interested, 4 modules have ST branded BUX41 power transistors, and two have 2N3773. All have LM301AH op amps in a can package.
Details on eBay here https://www.ebay.co.uk/itm/305892349275 Open to offers.
Details on eBay here https://www.ebay.co.uk/itm/305892349275 Open to offers.