Thanks to a fellow BCCI member I now have some numbers to put up.
0110-BRS-B (standard 110)
Variation 1, "50/USA" with no medallion, approximate dates 12-1-13 to 12-19-13, approximate production 11,000
Variation 2, "50/USA" with medallion, approximate dates 12-20-13 to 2-15-14, approximate production 26,670
Variation 3, "BUCK/50/USA" with medallion, approximate dates 2-16-14 to 12-31-14, approximate production 160,000
0110-BRSFG-B (finger groove 110)
Variation 1, "50/USA" with no medallion, approximate dates 12-1-13 to 12-19-13, approximate production 240
Variation 2, "50/USA" with medallion, approximate dates 12-20-13 to 2-15-14, approximate production 992
Variation 3, "BUCK/50/USA" with medallion, approximate dates 2-16-14 to 12-31-14, approximate production 5,000
There is no mention of any 2013 blades which makes sense with the above timelines.
My earliest according to dates on boxes are 11-14-13.