Leather v Silver Plate Tags, Dot v Underscore, Years and Changes

If it is supposed to confuse the conterfeiters, then it is also confusing me! I just saw my sister's twiggy the other day and was surprised that the round rivets do not have notches like what we usually see. I am 100% positive that what she has is authentic, but all these little differences, like hardware size, tags, even the lampo zippers (also noted in ateliernaff) just adds more confusion to us poor bbag addicts on how to discern a fake from a real one.
 
sorry for bumping this up....
i was at a consignment store today, and they have this Black City with a Leather tag another black city with a silver tag (i forgot which year it was from).
so could the one with Leather tag be fake? but it looks exactly the same as the one with silver tag and the leather is even much smooshier!! i think it was stamped "115748 2123" could it be an older season?!?
:confused1: :confused1:
 
Ok gals, so just wondering, does anyone know why the number of the front of the silver tags (the ones that start with N and end with the Season Code) are thought to be leather batch identifiers??

Also, can anyone tell me why the numbers on the back of that leather tag are thought to "serial numbers"??

Here is the data I have compiled, sorta by serial number. As you can see, many different styles have the same "serial number". :confused1:

mini-purse [130783] 1408
Giant Work [173080] 1669
Pochette [145695] 1669
Shoulder [138226] 1669
Work [132110] 1669
Afternoon [168027] 2123
Box [145694] 2123
Brief [173086] 2123
Giant Brief [173085] 2123
Mini-classique [132116] 2123
Oval Clutch [159675] 2123
Porte-monnaie [130782] 2778
Aumonière( (small) [159680] 3444
Courier [159671] 3444
Giant City [173084] 3444
Giant Day [173082] 3444
Men's Day [141175] 3444
Mini-twiggy [138223] 3444
Twiggy [128523] 3444
City [115748] 3444, 2123, 1787, 3160, 4276, 496393
Planet [138438] 3661
Giant Part-Time [173084] 200047
Part-Time [168028] 200047
Day/Hobo [140442] 213048
Extra Courier [159688] 213048
Flat Clutch [122733] 213048
Flat Hobo [108209] 213048
Large Shoulder [139068] 213048
Makeup [110481] 213048
Men's Weekender [156541] 213048
Purse [128522] 213048
Ring handled Hobo [128518] 213048
Shoe Bag [140442] 213048
Shopping [145704] 213048
Shrug [147185] 213048
Weekender [110506] 213048
Aumonière( (large) [160364] 492174
Bowling [163258] 496393
Mini-Bowling [163259] 496393
Giant Hobo [177288] 497717
Messenger [177289] 497717
Mid-Afternoon [168026] 2123, 496891
First [103208] 213048, 1699
 
I think the question is why am I doing this?!?!!? :upsidedown::lol::upsidedown:

Ok, two questions:

1. How do we know the Nxxxx number on the Silver Tag = the Leather Batch?
2. How do we know the numbers on the back of the Leather Tag = the Serial number?

:shrugs: