What is the click value on a Lyman 66LA?

[Fatelvis]

I'm trying to roughly figure my come-ups for some impromptu silhouette shooting this weekend, and was wondering if any of you know what a click is worth on a older Lyman 66LA rear sight on a 336 Marlin. Any help would be appreciated!

 

[JohnBT]

The new ones are 1/4 MOA, if that helps. Are the old ones different? JT

Manufacturer: Lyman - Mfr# 3662215

Specifications/features:
For flat receivers
1/4 MOA windage & elevation
Audible-click micrometer adjustments
Quick-release slide
Coin slot stayset knobs
Large hunting aperture disc
Small target aperture disc
4 oz.
For Marlin 336 & 1894 rifles

 

[ranger335v]

Welll, actually, it kinda depends somewhat on the length of your barrel, you know? Call it 1/4", that's close enuff.