This Duro Dakovic HR-M74 circa 1970's came to The Scuba
Museum brand new. It appears to be a clone of the Spirotechnique Royal
Mistral. The nozzle is oversized for US tank valves and the yoke is very
short limiting its practical use in the US without modification. This
model when opened was heavily greased and had to be cleaned before using it.
It is unclear if this was simply a protective coating or simply a ill-advised
set up method. There was also a civilian version of this regulator
produced called the Jadran. It appeared to be the same regulator with a
nicer blue themed label. One unique feature
to this regulator is that the inhalation and exhaust horns are switched from the
to common inhalation on the right and exhaust on the left. It is unclear
why the Croatian/ Yugoslavians made this seemingly insignifigant change.