Columbus Watch Company leaves

Starting a thread to capture information on the Columbus Watch Company, in its Gruen iteration.

Beginning in 1883...

Excerpt of Report from 1883 Swiss National Exhibition in Zurich (opened May 1 1883)
(Source: Le national suisse, Volume 28, Number 138, 15 June 1883; my translation)
...The important Madretsch establishments insisted on being represented at the exhibition--and they had good reason. Here are the products of MM. Aeby and Landry, who demonstrate correct and reasoned work. We have before our eyes the succession of parts: here stamped plates, drilled and threaded one after the other on pins which pass through the main holes; there, bridges, shafts, wheels and pinions, in different states of progress; further on, there are finished watches, calendar watches, alarm watches, chronographs, etc. We particularly like the “Columbus” pieces in this collection; They are fitted with a central pinion which unscrews: “patent pinion”. One of the calibers of MM. Girard-Perregaux et Cie found admirers and imitators here.

what has to be a fairly complete list of the time-only Columbus calibers circa 1890, ad from May 1890...

Wow, thanks for sharing, this is great! I have never seen this until now!

Awesome to hear, fun to find something novel after 130yrs!