Vintage Mazda Magnesium Foil Flash Bulbs no. 21; lot of 8

Description

Large Vintage Mazda Magnesium Foil Flash Bulbs
no. 21, Edison base.
Lot of 8
Exceptionally powerful.
5 in paper packing, 3 without.
Never used
, of course. Packages old and brittle.
I have had these for many years now and have shot one off now and again. They have always performed; no duds so far.
No guarantee, however  (can't test them).
I am a hobbyist and not a professional in this field. This item has been in my personal possession for years; I have shown and described it to the best of my ability.
Research well your needs and this particular item.
Please inspect the photos closely in order to be sure about your choice and f
eel free to ask any questions.
Shipping; tracked and
insured.
To the buyer; if you have concerns after you receive this, please communicate with me about any issues.