Hi,
The SNJ in the Museo del Aire at Quatro Vientos, which is marked as C.6-35, was always supposed to be the ex C.6-159, which in turn should be BuNo 27842 (c/n 88-13578).
But currently on sale on eBay is this BuNo 27842, somewhere in Ohio (USA), where the images clearly show the BuNo with USMC Cherry Point titles:
See http://cgi.ebay.com/ebaymotors/310330004574 for the add.
So I presume C.6-159 is not ex BuNo 27842.... Who knows more?
Hans