Serial numbers go in and out for various steps in the process at different times. There is no way to really say. For example, I just shipped # xl00276 today. Sure as heck ain't the 276th one ever made.
I was just going off of what Ty told me - he told me it was the 5th to come out of RA.
I put half the money down about a year and some before I got the call for the other half ;-)
IIRC, Ty said that I was something like 16th in line for the XCR when they made the debut..... but things changed 'cause I was the 5th to get my second half in. Seems like I had my second half in about 4 or 5 months before the first ones shipped.
It was SN 5X, and X is within the lower half (GRIN).
When I say that the XCR and I go way back, I mean WAY back! HA! DOUBLE HA!