Super Vel was indeed the name of the company and it was not Swedish, it was from Shelbyville, Indiana. Started by a guy named Lee Jarius (spelling of his last name maybe wrong). He pioneered the first 38 Special JHPs loaded to higher than standard pressure. His ammunition was a response to the poor street performance of the traditional 158g RNL bullet used by most LEOs back in the 60s and early 70s. The 110g JHPs opened most of the time but were poor performers compared to todays more highly engineered JHP bullets.
Also, this is most definitely not 38/44 ammunition. The HD and the Outdoorsman were pretty much things of the past by this time. This was just the pre-cursor to the +P 38 Special loadings of the major ammo companies.
Dave