Calculator Collection

Computers

IBM 701 from the year 1953

IBM only made 19 of this computers. From this IBM computer I have the vacuum logic module (circuit board ) and a loose set for expansion :

IBM logic module
This expansion module has the following tubes ( from left to right )
5 * Miniwatt Daric tube from 1956  (IBM E180CC 2.074.629 2258 )
3 * Telefunken 252551 6211






IBM expansion module
This expansion module has an Amperex 6687 tube from 1956 (IBM nr 68.3001 203613 )