MAR-VEL International began as MAR-VEL Underwater Equipment Inc. Since 1946 they have been supplying the military, commercial, rescue, scientific and recreational diving communities with diving equipment.
Another custom label Sportsways (Hydro Twin and Hydro Twin II) was for the catalog company MAR-VEL Products Co.
from Camden, New Jersey, which had a gold label with black
and red lettering. The name of the the regulator was CONTINENTAL. How many years the MAR-VEL
the CONTINENTAL is unknown, but they were made available for one or two years.