The 25th International Meeting of Collectors of Historical Calculating Instruments (IM2019) will be held from September 20th to 22nd, 2019, at the Badhotel in Scheveningen -- the seaside resort of The Hague, which is the government residence of the Netherlands. Below is the information pdf as well as the registration form. 

 

The 6th Bric à Sciences Scientific Antiques and Curiosities Fair will be held again this year on Sunday 13th October in Bures-sur-Yvette.

https://www.facebook.com/bricasciences