Can you identify this receiver sight?

[waco]

I can’t make out the brand. Anyone know what it is?

 

[JustJim]

Text says "REG US PAT OFF". If you show the whole sight someone might be able to identify it.

 

[waco]

I’ll get a pic up when I can. Thanks.

 

[scb]

Lyman https://cdn.shopify.com/s/files/1/1321/6167/products/IMG_0769.jpg?v=1579392247

 

[waco]

Great! Thank you. I hope I can find different aperture’s

 

[300BLK]

That logo is on my Lyman 48s , but not on my Lyman 66 or 57. I think Lyman, Redfield, and Williams all used the same thread.

 

[waco]

Good to know. Thank you!

 

[Glaciers]

I believe there’s two different threads, but one is very common and I’ve never run into the other.

 

[RicinYakima]

I believe there’s two different threads, but one is very common and I’ve never run into the other.

The other is for the pre-WW2 tang sights, smaller thread.

 

[waco]

Thank you guys.

 

[JWFilips]

Walter ,
I'm pretty sure I have a disc I bought by mistake for a Redfield It is A bigger thread diameter and I believe it is for a Lyman!
It is a 5/8 disc with .040" aperture if you can use that it is yours!

 

[waco]

Thank you Jim! PM on the way.

 

[RicinYakima]

Walter ,
I'm pretty sure I have a disc I bought by mistake for a Redfield It is A bigger thread diameter and I believe it is for a Lyman!
It is a 5/8 disc with .040" aperture if you can use that it is yours!

I think those are for the International and High Power sights. I find all of these old sights very interesting.