When did EoTech transition between the 512 from Rev. 'E' (thin membrane switches to Rev. 'F'? (thick rubber switches)
Thanks for any information from "Those Who Knows!"
From the Eo-Tech FAQ
What is the Rev F and how do I know my sight is a Rev F?
The Rev F is the latest production version for our 511, 512, 551, and 552 sights. It has an increased battery life and greater range from the dimmest to the brightest settings. Any sight manufactured after February of 2004 is a Rev F. Look on the bottom of the sight and you will see a manufacturing date. You can also see a small letter 'F' in the bottom right corner of the left side of the protective hood.