![Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales](https://images.squarespace-cdn.com/content/v1/60185ff470e83e7b6df2c3d7/1617524359704-57EM9ZXQAJNYALMCEV6M/rdp_0801-001_DSC08688.jpg)
Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales
![Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales](https://images.squarespace-cdn.com/content/v1/60185ff470e83e7b6df2c3d7/1617524415334-0KXM2J662FPR7ZQRD57E/rdp_0801-008_DSC08695.jpg)
Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales
![Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales Slide Rule Faber Castell 57/87 Rietz Schul-Rechenstab — Robert's collection of antique scientific instruments, curiosa and scales](https://images.squarespace-cdn.com/content/v1/60185ff470e83e7b6df2c3d7/1617524365793-JYDCLVS24BK9TUN022ZW/rdp_0801-002_DSC08689.jpg)