Thanks for the comments G99.
The bronze alloy used on the latest batch (CuSn8) is I think the same as that used on the Pam 382. It looks a lot like rose gold when new but settles down quite nicely with a bit of advanced aging.
It's absolutely massive though and weighs a ton! Far heavier than my Pam 112. It has little horological 'purity' but was a must-have impule buy. Couldn't be happier!
Cheers John