Rectilinear Coordinatograph, cased, by Haag-Streit, AG, of Bern, Switzerland, dated 1979. No.53000674 Rectilinear Coordinatograph 1979
Polar Coordinatograph (cased) by Haag-Streit AG, of Bern, Switzerland, dated 1965. No. 51000212 Polar Coordinatograph (cased) by Haag-Streit AG 1965