" If price of the Fiddy is priced a few grand less than this piece in the pre-owned market, these pieces with Minerva movements looks more `reasonable` then, imho"
never thought about it this way, but you have a good point
25K usd for a 47 mm 1950 (LE 1950 pce) with unitas movement or about the same amount for a 47 mm radiomir (LE 150 pce) ... in that case one of the 150 Rads looks the most obvious choice