Jakobson 1770

 

 

source: Peter the Great Museum of Anthropology and Ethnography, St.Petersburg, Coll. No ML-00469

 

 

photo: W.Szrek

 

photo: W.Szrek

 

photo: W.Szrek

 

photo: W.Szrek

 

 

source: Apokin, Majstrov Development of Calculating Machines (1974)

 

 

source: Apokin, Majstrov Development of Calculating Machines (1974)

 

 

           

 

 

 

last updated: 09-Dez-11