With respect to reed breather valves employed on Norton engines, myriad types and varieties have been designed and employed over the years. My Commando is presently fit with the COMNOZ/NYC Norton breather valve fit to the bottom of the crankcase. I am presently working on a 1930’s vintage bike and intend to alter the breathing system with a reed valve mechanism. I have had my breather apart and seen the 2-petal reed breather present in said valve. However, I don’t care to disassemble the valve at this juncture to inspect the reed valve to see the size and type it is. Would anybody happen to know the brand, part#, and/or application of this reed valve? Something makes me think it is a BMW or Mercedes product, but have no recollection why I would think that, or where the info came from. Any help would be appreciated. Thank you.