Here is a good supply of modern flash bulbs for your classic focal plane shutter miniture camera. These are just what your Leica, Contarex and Exakta need.
#6 and 26's are exactly the same, just different manufacturers.
This mixture includes 69 clear bulbs, and 15 blue coated. Of course you can use the blue's with black and white film, just open up one f stop. To use the clear with color film just use the right series 80 filter. $29.95 shipped in CONUS. Paypal or USPS MO. firstname.lastname@example.org