Quoting the Tweet you mentioned:
The average CRYPTOMAT sold for around 3 bitcoins... of course the price of BTC was in the $200's back in those days
While these are rare, I don't think you would get anywhere near 3
BTC for this watch at current BTC price.
I would offer something myself but I have no idea what a more realistic price for these will be. Maybe someone else can chime in?
I mean it is rare, you cannot buy them with fiat, I have never even seen one sold for fiat, they list their prices in fiat $880 USD typically retail but only payable in BTC at least back in 2014. I did pay ~3 BTC for it and it is a low number.
I am certainly open to offers...Hopefully minerjones or someone will.