Vintage Texas Instruments SR-40 Calculator with Case & Manual - Working

Vintage Texas Instruments Sr40 Calculator With Carrying Case Manual Rechargeable

Vintage 70s Texas Instruments SR-40 Calculator W/ Leather Zipper Case WORKING

Texas Instruments Vintage SR-50A Electronic Calculator With Battery **Read**

Texas Instruments CONCEPT I (1) Vintage Calculator Good Working Condition

Vintage Texas Instruments SR-40 Calculator w/ Case & Manual Not Working

Texas Instruments SR-50A Vintage Calculator - Not Tested

Texas Instruments SR-40 NO PLUG WITH CASE Calculator Rechargeable Model 1977