This is a cumulative inflation rate of 1312%
This horn is so rare this is only the second one of these iHorns ever made
Kent helped found the Atwater Kent Museum of Philadelphia
The Duaflex were designed as a cheap
The Cema iHorn is a big bell radio horn made in Paris in 1924
Little Giant Adding Machine horns This is a cumulative inflationThe Little Giant Adding Machine iHORN is made from an antique Little Giant Adding Machine. It was patented in 1924 by John Pfeifer of Springfield, Ohio. Mr. Pfeifer was a free thinker with a creative mind to solve mechanical problems of the times. During his lifetime he took out over sixty patents, including calculating machines, cash registers, change makers, grave vaults, dictaphones, morgue tables, automatic curtain hangers, signal devices, locks