Mini-prism GTP25 in metal housing and tiltable prism holder GPH30 with LEICA-Adaptor

The mini-prism GTP25 has a high accuracy of 2".
Tiltable frame-shaped prism holder GPH30 made of metal with bubble and graved targets, female threads at top and
buttom.

With LEICA-Adaptor

Threads at top and buttom: 5/8”