4 to 5 years ago, these parts found with sterile - ie unlabeled dials - primarily on eBay from China or Hong Kong. Priced they were between 60 and 90 euros ... and more they are not even worth today.
One might almost think that these "clocks" are simply taken during the production process in any "Chinese watch manufacturer" from the band in order to offer this problem can.
Such semi-finished Chinese "watches" in the Rolex look at least an effective approach to unmolested by customs / brand protection, to be able to generate good money in the European market for sales (too much).
Given that discussions about Parnis are undesirable in almost all known German Uhrforen, this impression is reinforced.
You ought to know cost alone watches with good quality and reliable brand movements from Seiko and Citizen - even Steinhart has with its Swiss Made Rolex tributes a good value for money in terms of quality and service.
This is my opinion on such gizmos and I find it unfortunate that Amazon for this "Keeping Up Appearances, as His - products" offering a trading platform.