No 1. 20.85 mm thread. 25.2 mm lip. 3 screws.
No 2. 29.9 mm thread. 3 screw holes with the fourth deliberately left empty to allow nitrogen fill. Split portion locks the reticle in place when tightened.
No 3. as No 2 but with ladder in lower half.
No 4. 20.9 mm thread. 22.5 mm lip. 2 cut outs for tool.
No 8. 25.95 thread. 26.5 lip. TV screen.
No 9. same as No 8 but full circle duplex.
No 10. 22.7 mm thread. 28 mm lip 3 screws.
No 11. 24.8 mm thread. No lip. TV screen.