I have digitised a English version of a Curta 1 service manual und a set of drawings of the Curta 1 from 1950.

These are the oldest known drawings of a Curta 1.

The drawings can be downloaded from Rick Furr's website vcalc.net. File size approx. 115 MB. Link: http://www.vcalc.net/Documents/Curta_1_Engineering_Drawings_1950_s_de.zip

Additionally I have sent an English service manual to Rick. You can download it from vcalc.net (27MB): http://www.vcalc.net/Documents/Curta_1_Service_Manual_eng.zip

The already known drawing sets of Curta 1 and Curta 2 are now available in original colour:

Curta 1 (56MB): http://www.vcalc.net/Documents/Curta_1_Engineering_Drawings_c_de.zip

Curta 2 (39MB): http://www.vcalc.net/Documents/Curta_2_Engineering_Drawings_c_de.zip