Canon Palmtronic F-6 scientific calculator from 1975 (kind of rare now?)
Jobber 6 Construction Calculator for Builders and Do It Yourselfers. It is part of the award winning line of construction calculators by Jobber Instruments. It is the only calculator with the 0-15
Model 6 Calculator from Addo, 1920s for sale at Pamono
10 Digit Professional Grade Heavy Duty Commercial Printing Calculator - Victor Tech
iOS 11 Bug: Typing 1+2+3 Quickly in the Calculator App Won't Get You 6 - MacRumors
Braun: ET 66 Calculator (BN-E001BK) : Amazon.in: Office Products