i searched your site and the web, but could not find a pic with the same diaphragma. it seems to be completely alu, but with a clear plastic-ring glued over the border of the hemisphere and the flat part with the grooves.its not the same like the white suspension, its just a 0,2 inches wide ring of clear something, the suspension itself seems to be alu. bought it new in 1994 as far i remember.(hard for me to find the right words, i apologize for my bad english..). red part in the pic alu, black clear plastic. |
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