WBR serial numbers

[winchester37]

noticed a close-up of the new MkIV 22/45 lite that showed a serial number beginning with 'WBR.........' Didn't realize that the use of the 'WBR' was that spread out, thought it was for just the WBR gun/knife set. Are they numbering all guns like that?

 

[RPM Enterprises]

What I have seen so far is all mark IV autos have the WBR prefix. No other models have it. My opinion is I would guess that all mark IVs will continue to have the WBR most of this year (2017). I would expect a change to number prefix's later this year and begin full production in 2018.