These mostly Toshiba parts are original leftover from my service business in the past. Only 2SD426-R came from ONKYO. 2SD426-R, 2SB531-O, 2SB554-R, 2SB555-R, 2SC1050, 2SD551-R, 2SD341, 2SD665-R
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They have all been tested and are good for use.