When someone asked in a thread for SD9s, I said to myself, too bad, I've never shot them. Then I remembered these two. I found them resting at the MILW enginehouse in Bellingham Wa August 9, 1972. That's 533 in the foreground and 532 in the back. The builder's plate on 532 said SD9 (Built Jan 1954)but I'm not sure if they had been upgraded to SD10s then or not. anyone know?