Duro-Test LIGHT BULBS- KR. ATM-9, 100 watt, 1300 AV. LU, 7000 hr

For Sale:  Here are two new/old stock vintage (probably 1980's) rare light bulbs found in a salesman's display kit.

Both tested and working well, mint shape.

They are marked 120v 100 125v, KR ATM-9, Duro-Test, 1300 AV. LU, 7000 user hours.  I think but am not positive the 100 is for 100 watts.  They have a uniquie looking filament and bulb shape. These may have been designed for use in traffic signals.

Sleeve included as shown.

Additional and/or higher resolution photos available on request.. 

Send your zip code and city for a shipping quote- should be between $5.99 and $6.99 if you are located in US of A.  (June 2023).