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Title Addiator Add-A-Time
Date ca. 1960
Collection Delta Air Lines Onboard Items
Object Name Calculator, Pocket
Catalog Number 2015.77.1
Description Brass mechanical calculator, "ADDIATOR/ ADD-A-TIME"; eight columns with a sliding metal plate on the inside that can be manipulated with a stylus. The sylus is held on the side. Text above the columns reads, "hours or decimals/ min." The front adds, the back subtracts. A brass handle at the top is stored in the down position, but resets the numbers to zero if pulled upward.

Subration side reads, "Made in Germany" "P.O. Box 614/ Euless Texas 76039"
Artist/Maker Addiator Gesellschaft, Berlin, Germany
Provenance This Addiator Add-A-Time was used by pilots and flight attendants to add their flight hours. Sue Zino, a Delta flight attendant from June 30, 1969 - January 01, 2002, purchased the calulator from Delta pilot Wayne Sanderlin in the mid-1970s.

When Sue began flying, the Flight Attendant In-Charge position was given a small sheet of paper by the Flight Engineer that told her the time they "push back from the gate and pulled into the gate" at the destination (commonly referred to as "block-out to block-in") … Flight attendant pay was based on those times, not the total time they were on the airplane. The Flight Attendant In-Charge would then transfer those times by hand to a paper "flight log" and at the end of her rotation turn it into the company so they would know "total flight time of the rotation" which is how they got paid. Since Sue flew the lead position most of her career, the Addiator made calculating total flight time for the day/rotation very easy. Sue stopped using the Addiator after Delta went to automatically retrieving the times from the actual aircraft's system,making paper flight logs obsolete.
Credit line Gift of Sue Zino