Vintage Edison Tested Tool-Johnson WilliamsMODEL G Gas Indicator-Works OrDisplay

Description

Free shipping to the continental states.
Item does come with a tag from Edison (electric company) staging that it was inspected and repaired, I would guess that means this unit is operational, although I have no way to test it
Comes with original wood box + tags and stickers.
JW Sniffer (R) Model G, combustible gas indicator in green and grey plastic bodied case. Single linear meter with arbitary unit 2-10, dangerous and 10-12, explosive. Instructions on the side of the instrument body. Serial no.670493. Made by Johnson-Williams Inc. Mountain View, California, USA. US patent no. 2786350. Date 1965-1975.
Johnson Williams MODEL G Combustible Gas Indicator USED. Condition is "Used". Shipped with USPS First Class.