The 17pdr Anti-Tank Guns came with a No. 41 (early) or a No.51 (later) Sighting Telescope. The No.41 had a 1.9x Zoom w/ 21 degree FOV & the No. 51 had 3x Zoom w/ 13 degree FOV. I'm not sure how that compares to our current model
The only thing that matters to us in the game is the numbers a thingies that make the job of estimating aim as close to an aimbot as possible like the current reticle in the 17pndr. The anti-tank telescope sight in both version had a simple cross hair as the picture shows because they expected ambushing tanks to be at max 1800yds or pretty much line of sight. The left and right hand tick marks were if a small bit of lead was needed.
Like I said, Hitech is being very kind to us so we can shoot out to 4000yds and estimate range like a semi-aimbot. Letting a tank in the game get inside of 2000yds of you in a 17pndr is very often a loosing proposition.
As for unlocking the views. The gun team did have a commander but, it was a different team member who aimed. So maybe a commander mode where the gun stays fixed while the commander twirles liked a dervish with his binoculars.