Ordnance code Bdn, ....

[Ernst60]

Hi all
I have a few ZZ42 fuse parts marked with 'btb 34' and 'bdn' but I can't seem to find these codes in any online data pages.
Any help would be appreciated .

...Ernst60

[klarkon]

bdn = Robert Tümmler, Döbeln-Sachsen
btb =J. Duderstadt, Metallwarenfabrik, Esslingen am Neckar

[Ernst60]

awesome

Thanks so much for the quick response