I do not own the Cali, but I have A JLC tribute to Polaris, which also has a plexy crystal and which was also designed to pay a close homage to an historical piece. You do have to be more careful with respect to the crystal on these pieces, but it is worth it for these special watches, no?. The domed plexy crystal is an imprtant design element -- it also just looks phenomenal on both the PAM249 and the Polaris.
This is a great topic, Oscar. I am glad you posted it and that there is at least a little discussion here about it.

Best,
respo