Ziggy there was also the marketing angle used here, By stating OEM he was implying made by panerai and when questioned what he ment by OEM he replyed panerai, not as the case would be, ETA, as we all know that panerai do not make there own going trains and springs or a lot else on the unitas based movement other than bridges and decoration. He would show a packet marked "panerai" with some screws in it and then claim just about all bar the base plate to have come from panerai,
Note, Rockarep may well have paid for all the spares direct from Panerai, but only if he was real stupid as panerai will just repackage ETA parts and triple the price on 80% of the movement parts