Vintage US Dept of Interior Bureau of Mines Flashlight Fulton Mfg. Corp. Works

Description

Vintage US Department Of Interior Bureau Of Mines Flashlight - Fulton Mfg. Corp.
Working condition, pretty heavy with batteries. Takes two (D) batteries. Will ship without batteries (batteries not included).
Color: black with yellow ends
Side of flashlight reads:
Permissible Electric Flashlight
Approved for use in methane and air mixture only
Dept of the Interior Bureau of Mines
Mineral Industries
Approval No 618
Issued to the Fulton Mfg. Corp
Wauseon, Ohio
Then it goes on and describes what gases it can be used for. As shown in photos.
I am not sure of the exact year.
Please see all photos for content, measurements and condition.
We ship only within the United States, thank you!