Documented in May 1949, larger size due to the hoses being larger and heavier. Aircraft-style hose clamp. Seven (7) teeth.
 
Four (4) required for models 149, 249. Six (6) required for models 250, Warrior, Warrior TT. The two extra clamps go to the cam chest breather line, which routes under the battery box.
 
These are no longer in production, and I was fortunate to have found a healthy supply of NEW clamps. They are olive drab green, but can be painted flat black to match the originals. Enjoy!