David Wilson
Contributor
Having no access to a 1962 Pirelli underwater catalogue, let us proceed directly to 1963:
So there is the Tritone, bottom left as before, but with a caption this time: "TRITONE (m.r.). Con ghiera metallica e vetro trapezoidale; ampio camp visivo. L. 1.500." (TRITONE. With metal band and trapezoidal window; large visual field. L. 1,500). I'm afraid I can't shed any light on the meaning of the Italian abbreviation "m.r." Can anyone chip in with a possible expansion? At least we now have a more precise definition of the mask shape: trapezoidal.
In terms of the geometrical shapes above, the Tritone probably qualifies as a rounded isosceles trapezoid, but let us not be overly technical.
1964
No change there in the description or price of the mask top left.
1965
A splash of colour at last, light blue. Same description, however, with a small price hike.
So there is the Tritone, bottom left as before, but with a caption this time: "TRITONE (m.r.). Con ghiera metallica e vetro trapezoidale; ampio camp visivo. L. 1.500." (TRITONE. With metal band and trapezoidal window; large visual field. L. 1,500). I'm afraid I can't shed any light on the meaning of the Italian abbreviation "m.r." Can anyone chip in with a possible expansion? At least we now have a more precise definition of the mask shape: trapezoidal.
In terms of the geometrical shapes above, the Tritone probably qualifies as a rounded isosceles trapezoid, but let us not be overly technical.
1964
No change there in the description or price of the mask top left.
1965
A splash of colour at last, light blue. Same description, however, with a small price hike.