I have a Standard Arms model m with a tang sight. I am pretty sure it’s a Lyman. The “post” is missing.
Where might I find a replacement?
If no luck does anyone know the size and thread and I will try fabricating one.
thanks

https://www.ebay.com/itm/38427...f:g:I7YAAOSwwztg8Hm0
Check ebay. I have seen and bought several over the years. Just one example. This guy likely has what you need.

Will look on eBay.
Think my Gun guru guy was mistaken.
After looking at lots of pictures, I think it is a Marbles sight.
Will continue to persevere.

Look like these

http://www.marblearms.com/peep-tang-sights.html

Looks a lot like the the old ones pictured.
Was original to the rifle.
1910 or so.
Maybe I.D. numbers underneath but the screws were buggered years before I got it.