I found some NORS wheel cylinders that I have bought at sometime or other. I let a guy that bought a bunch of stuff at an auction borrow my old parts books and interchange books a couple years ago who now can't find them so lesson learned. Can someone that was smart enough not to loan out their old books help me out please? The United(NAPA) numbers are 7536, 7537 and 7564. Any help appreciated !
Since your HAMB name suggested Buick, I checked the Buick listings in my United catalog and found this: #7536: Front Left Hand cyl assy for 1942-1957 Buick, 1-1/8" diameter #7537: Front Right Hand cyl assy for 1942-1957 Buick, 1-1/8" diameter #7564: Rear Right Hand cyl assy for 1942-early 1950 Buick, 1" diameter. The front cylinders are also listed as fitting other early GM cars, let me know if you want that info. Hope that helps!