Lyman
I would go to browning .com.They have a link to serial numbers on the sight that should help you.
The wheel sight on the Browning .22 refers to a type of adjustable rear sight commonly found on Browning's .22 caliber rifles, such as the Browning Automatic Rifle or the Browning T-Bolt. This sight features a circular wheel that allows the shooter to make precise adjustments for elevation and windage. The design provides a clearer sight picture and facilitates easier targeting at varying distances. Overall, it enhances accuracy and usability for shooters.
Your Browning .380acp was one of the last guns made in the year 1965.That year the last serial number was 598804.It should also be noted that the Browning 380 was redesigned due to the gun control act of 1968.This new model came out in 1970 with a longer barrel,adj.rear sight,and modified grip.
Savage 325c rear peep?
It is possible.
None
Requires appraisal
The thread size is: M3.0-.5 The Browning part number for the bead is B1116580
I would go to the Williams gun sight company.They should have a chart that will answer your question for you.
3x0.5 thread
The Marlin Model 57 typically requires a specific scope mount designed for its unique receiver and sight configuration. The common choice is the Marlin 3/8" scope base, which fits the grooved receiver of the Model 57. It's important to ensure that the mount is compatible with the rifle's design, so checking with the manufacturer or a reputable gunsmith can help find the right fit.
Don't alter your BLR by drilling holes in it. Instead, find a receiver sight that utilizes the existing scope mount holes in the top of the receiver. Extra holes are unsightly and they destroy much of the rifle's resale value, especially to collectors. It is best not to make permanent alterations to a firearm such as yours. That's my answer.