Aristo Nr. 623 Mercator

Click on the next link to see professional panoramic pictures of the 1/98 Electro model

https://sliderulemuseum.com/Archive/Aristo_Commerz_623_WenzelCollection.jpg

This image is from Rod Lovett's Slide Rule Collection Website.

Rod's Aristo Circular 623 Slide Rule (lovett.com)