The Vario is a long-lived series of leaf shutters that were made by the German company Gauthier based in Calmbach.
Most Vario shutters have 25, 50, 100, B, T speed settings. Another wide-spread variant has the speeds 1/25 sec., 1/50 sec., 1/200 sec., and B. After (during?) World War I Vario shutters were copied by the French manufacturer Gitzo and marketed under a number of names ('Platos', 'Plavicos', 'Vistar', 'Gitzo' (see Gitzo Shutters).
- Shunkan o torae-tsuzukeru shattā-ten, p. 6.
- Kamera no mekanizumu sono I: "Hai! Chīzu" Shunkan o torae-tsuzukeru shattā-ten (カメラのメカニズム・そのⅠ・「ハイ！チーズ」瞬間をとらえ続けるシャッター展, Camera mechanism, part 1 "Cheese!" Exhibition of instant taking shutters). Tokyo: JCII Camera Museum, 2002. (Exhibition catalogue, no ISBN number)
- A discussion of the postwar Compur-Rapid and Synchro-Compur models in a page by Andrew Yue about the Agfa Isolette
- Repair notes of a rimset Compur and of a Compur-Rapid at Daniel Mitchell's camera site
- Synchro-Compur servicing at Roland and Caroline's website
- Compur shutters at S.K. Grimes
- www.kamera-geschichte.de - Huge overview over shutter types and models (German)