Swing Tag (Hang Tag) Errors Oakbrook/Oak Brook: “Oakbrook” is frequently printed as one word on the left side of the tag when it should be two words, “Oak Brook”. Location Swaps: Some rare versions list “Fareham, Hants” as the city on the swing tag instead of the more common “Waterlooville, Hants Numeric Birthday: Earlier 4th generation tags list the birth date numerically as “8-13-96″ rather than the written-out “August 13, 1996 Oakbrook Misspelling: Similar to the swing tag, “Oakbrook” may be printed as one word on the tush tag. Punctuation Quirks: A comma instead of a period after “IL”e. A period and comma appearing after “INC” 1965(KR) Marking: While technically a patent reference, this mark is often marketed as an “error” indicating a Korean market production. Physical Rarity Factors PVC Pellets: Spike filled with PVC pellets is considered much more desirable than the standard PE pellet versions. Missing Stamps: The absence of a red numeric stamp inside the tush tag is often cited by collectors as a sign that the item was not mass-produced.