Dont know why but 1-30 were in '92 Wd. Cd., in '93 #31-60 were released in West packs & have the WFF prefix, #61-90 were released in East packs & have the EFF prefix, #91-120 were released in Central packs & have the CFF prefix, East West & Central were the parts of the US they were released in.
The Gold and Silvers also have the same prefixes
The Stat Smashers were also released like that, #1-52 in '92 Wd. Cd., #53-72 are WSS, #73-92 are ESS and #93-112 are CSS
Golds are the same way