I own a 1954 production M64 Winchester in 32 Special. I want to find a receiver sight to put on it along with an older sourdough front. Does anyone have the reference tables for Redfield or Lyman that show which sight model I would be looking for? Also a source for the sourdough insert since they are becoming tough to find. Thanks.

Brownell's has a remake of the Sourdough. Lyman's receiver sight # is I think #55. Williams makes a Foolproof for the 94, but I'm not sure Redfield makes them anymore.
Williams also makes the 5D for Marlins and 94s, but IMHO, it's a piece of crap. Usable but crap.
Currently, I see no real difference between the Lyman and Williams as they are both now made of aluminum. If you want a steel Lyman or Redfield, I suspect you'll have to haunt the gun shows to find one.
Paul B.

Look on eBay for a Lyman 66A or a Redfield 70E. Both sights are high quality steel, no longer made.

Try Gary at (817) 346-9633. He carries more old Lyman,Williams and Redfield sights than anyone I have ever seen. He’s really slow to answer, but I have bought several Lyman 48’s from him and they were really nice and the price wasn't bad.

He runs ad‘s in Precision Shooting and Gun Weekly all the time.

You guys are quick! Thanks for the excellent advice, I really appreciate it.