I usually employ the use of the bulb flash with my Minox cameras. I have acquired a good lot of AG-1 blue and clear bulbs and a coupke of Eveready batteries. Using the bulb flash gives the Minox user a taste of that 60’s photography, in my opinion.
I have a sum of these flash guns, all using the AG-1 and none using the flash cube. Don’t ask me why, I don’t like the appearance of the cube, I guess :-)).
This model I use with my A/IIIs cameras. Fit as a glove.