Magic the Gathering (MTG) : 

The "4th Alternate" MTG cards were cards that was printed by "United States playing cards Corporation" in Cincinnati (US of course....). All cards are issued from the 4th Tournament Starter Deck (ISBN 1-880992-25-6), and starter deck (ISBN  1-880992-26-4) no boosters were produced.

You don't need to have a "Infrared lamp" or others "things" to recoignize them even if they are similar to 4th Edition, they owns a slightly Glossy texture (ususally more easy to see that to the back side of cards).

The best method to distinguish them from standard Magic cards is to take a close look at the "Magic" logo on their backsides. While standard cards have some light blue areas, especially at the topright part of the letter "A", these cards feature a completely dark blue logo.

Thoses cards are similar to the "Ice Age Glossy Serie" (First Tournament deck ISBN), printed by Carta Mundi (same period as test print for WOTC, to compare them with "United States playing cards Corporation" printing but the quality is worst for the US ones.

Pics show in the shop are issued from my 4th Regular version data base.

Notes:

*Thoses cards are dated 1995.

*Grading on 4th Alter is SPECIFIC due to the glossy type card.

*The card "Junún Efreet": Reformatted text. Text is on the left of the text Box instead of the middle.
* The card "Shapeshifter": It has a bold white copyright.