Redfield Target Sight question

[jackh]

What is the difference between the Redfield target rear sights:

Redfield International Match

and

Redfield Olympic Model

[Hap Rocketto]

According to Nick Stroebel's book Old Gunsights, the Olympic is 1/4 minute and the International is 1/8 minutes.

[stephen_maly]

The International rear sight has anti-backlash springs, and the Olympic rear sight does not.
The International Mark 8 ("MK 8" is stamped on the windage knob) has 1/8 minute of angle clicks, the others are all 1/4 minute of angle per click.