Jaap Scherphuis | Precisa 102-1 adding machine @jaapsch2 | Uploaded October 2022 | Updated October 2024, 5 minutes ago.
The Precisa 102-1 adding machine was made in Switzerland in the early 1950s. It has some quirks that you need to be aware of when using it, and its recall functionality is very unusual.

For more information on this machine and others in my collection, please visit my website:
jaapsch.net/mechcalc

0:00 Introduction
0:51 Addition
1:16 Totals and subtotals
1:58 Subtraction
2:25 Negative totals
3:30 Non-add
3:55 Non-print
4:29 Repeat, multiplication
5:34 Recall
8:17 Crossbow logo
8:50 Opening the case
10:25 Printing mechanism
11:01 Subtraction mechanism
11:53 Non-print mechanism
12:40 Reassembling case
13:08 Outro