O&H
Manufactured in Victoria from 1912 to 1915.
Speedway rider Reg Challenger fitted a 500cc JAP V-Twin from a flat-tank O&H to one of his machines. The article mentions St Kilda but it is not clear whether this refers to O&H or Challenger.
Sources: oldbikemag.com.au; vmcc.net; Simon Fleming.
Rarer Australian Marques