Hello,

as John already mentioned, KM100 diameter was increased ~1990 from 21mm to 22mm, to make the capsule threads more solid. The thread size stayed the same, so all capsules and bodies are interchangeable.

#61479 is the part number for the logo for 22mm housing tubes.
For the 21mm housing tubes, please specify the 21mm *explicitely* when ordering, and attach this mail when contacting Sennheiser Nordic. Then we can make some for you. No separate spare part number available.

Best regards,
Martin Schneider / Neumann Mic. Development