You can speculate all you want about the BSW but the BoC & their printers have been known to short-change several prefixes over the years:
$20 Journey EGR (there's others like 2011 AUT which seem tough)
$10 BEP, BEL & 2003 BER
$5.00 2001 AOF & 2004 HOH
& for polymer it is (or should be) a well known fact that the EKZ $100, AMK $50, BSW $20 & FTH $10 were all shafted in terms of the numbers released. Actually the M-C FTH came as a real surprise since it was like the 2003 BER since the 2004 BER had a full release & the M-P FTH had a full releases. Also M-C GHD $50 & W-P FVP $20 were also scarce in numbers.
It is very helpful to learn this kind of info from someone who has been actively collecting and going through bundles since the Journey notes were new. As always, thanks for sharing your knowledge walktothewater.
I think there was a typo, as EGR is a Birds $2 changeover. I wonder if you meant the $20 Journey ERG, which has about half the population reported in SNDB as most other full-run prefixes.
It's kind of interesting to go through the Charlton and see the values for, say, the 2003 Jenkins/Dodge $10s, and then realizing that the book values don't really correspond to the SNDB population reports – most should be priced higher than they are due to scarcity. I think I remember seeing talk here that Charlton needed to be able to observe more sales history before revising their values for certain prefixes.