vintage GE Photoflash mazda base flashbulbs mid century large format cameras

Lot of 7 vintage General Electric large flashbulbs with mazda screw type bases. There are 2 blue flash bulbs and 5 clear ones. There are a number of the original paper sleeves but they are worn and torn.

We've been told that this size of flash bulb is used with vintage large format cameras like Graflex, Speed Graphic and other pressman and newspaper cameras.

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Item No. nt52212