Goecke 25MM Leica Style Prism  (46-MP)

Goecke Schwelm 25mm Mini Prism w/ 16.9mm Offset

Goecke Part # 46-MP

Target distance 46-MP:     approx. 500m
Target distance 46-MP38: approx. 1,000m
Grinding accuracy:    < 5“
Recording:    12mm socket
        (LEICA compatible)

Tilt-axis height:     86mm
Offset 46-MP:    -16,9mm (Leica +17,5mm)
Offset 46-MP38:    -34,4mm (Leica 0mm)Roughly 500 meters for the smaller 46-MP found and 1,000 m on this larger diameter 46-MP38 prism Found Here