PCGS holder question

I have a PCGS Gen 3.1 which is the last of the Green Label and a Gen 4.0 which is the 1st Blue Label.
The transition was in 1998. Both holders have a 7 digit serial number. The green label begins with 4 and the blue begins with 5.
Is it safe to assume the Gen 4.0 was graded in 1998 since the serial numbers are not too far apart?
0
Comments
I have green labels, blue labels, white labels..... and no idea of what 'Gen.' they are.... Do the different labels now command premiums? Or is that just for those who focus on slab/label differences? Is there a resource for identifying all these differences? Or is it just anecdotal history? Cheers, RickO
I don't really have an answer to your question, but here is a link to the history of the PCGS slab.
https://pcgs.com/holders
Donato
Donato's Complete US Type Set ---- Donato's Dansco 7070 Modified Type Set ---- Donato's Basic U.S. Coin Design Set
Successful transactions: Shrub68 (Jim), MWallace (Mike)