There is however difference in size depending on the set, where the first few sets had much larger 1st edition symbols than the latest Japanese 1st edition sets (the three displayed below from left to right are the Pokmon Web, EX Sandstorm [Miracle of the Desert], and HeartGold & SoulSilver [L1] sets): Japanese-1st-edition-sizes1280364 150 KB There are also Japanese sets which only have a 1st edition print run (without unlimited edition print run)
Sealed Base Set 1st Edition Shadowless Pokmon blister pack (1999, vintage WOTC)
Of course, were only going by the current, highest market value cards on TCGplayer, and you may find incredibly rare variants and graded cards for much higher elsewhere on the secondary market
Rocket's Scherox (BEST 4) 120 Attacks & Abilities Ability: Danger Sense If this Pokmon's remaining HP is 100 or less, its attacks do 80 more damage to your opponent's Active Pokmon (before applying Weakness and Resistance)
1st edition Pokmon cards will contain all three features that will differentiate them from the base set
