I see some Da's made in Pico Boul. some in warner, and avrious other places.
Some seem to command higher prices than other, even though they all look the same. Is there one place of manufactruring which was higher quality than others?
How would they be rated as far as desireability./collectability # 1, 2, 3 etc. of the many double hoses made by aqualung, whihc one would or should be the first in any collection?
lastly what makes one made one place and another made elswhere more valuable if this is the case.