![](https://coimages.sciencemuseumgroup.org.uk/74/294/large_thumbnail_1990_0459__0002_.jpg)
![Monroe calculating machine miniature model](https://coimages.sciencemuseumgroup.org.uk/439/904/medium_smg00052807.jpg)
Monroe calculating machine miniature model, in despatch case with lock and key; full keyboard, capacity 8 x 8 x 16, manual operation
Monroe calculating machine miniature model, in despatch case with lock and key; full keyboard, capacity 8 x 8 x 16, manual operation