to your question .... YES,
By: tic-toc : September 15th, 2008-06:09
i believe patek calatrava 96 has made in enamel dial, but that was long time ago. regarding modern 3796, according to Antiquorum june 2002' Hongkong auction, one particular calatrava made special has black enamel dial ... but i cant be sure of the dial be...