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This is a vintage mechanical pocket calculator. Troncet calculator with addition on front, subtraction on reverse. It comes with its original stylus. It is about 12.7 x 9 cm (5" by 3.5"). Sumax-E model made by Addumult, Donauschingen, Hans-Wolfgang Kubler, Germany.

15% off original price!
Please no coupon codes on sale or clearance items. Thank you!

*** International customers *** Please note that you may be able to half the shipping costs by shipping via surface mail. However, delivery times can then be 4 to 6 weeks or longer. If you are interested in surface shipping, please contact me.

All of my vintage items are sold in as is condition. Most of them are used unless I state otherwise. I do my best to ensure that the photos show all aspects of the items so that any flaws, stains, chips are visible in the photos. If you wish to view additional photos of the items or require more information. Please contact me.

For combined shipping, I will refund cost differences if the difference is more than $1 between the estimated and actual costs. Alternatively, if you'd like to purchase multiple listings, please contact me and I'll create a special listing with accurate shipping prices. International shipping costs from Canada are high for heavy items. Please see more about how I ship in my policy section:

Stop by my other shops? I am more than happy to combine shipping with items purchased from my other shops:

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SALE Addimult Sumax-E Mechanical Calculator / Vintage Troncet / 1950s calculator / Addimult troncet


  • Vintage item from the 1960s
  • Material: aluminum
  • Ships worldwide from Canada
  • Feedback: 306 reviews
  • Favorited by: 87 people