Police bikes were notorious for have some weird specs. There's a version with alternator AND generator with coil ignition.
Police bikes from Oz were brought here to Hawaii. Folks from Montgomery Motors would go there and attend the auctions.
I've had one; a '62 Thunderbird. They were brought here, given psychedelic paint jobs and apehangers and the swabbies lined up to buy them.
They would generally have high mileage, but good service record.
I've seen the "C" stamped on 6T's before and wondered what it meant. I thought it might be coil ignition, but that would be redundant since all 6T's from 53 on had that.
As found under a house on Molokai.