Very correct answer. All new rubbers (newly manufactured) require an ITTF number, rubbers that have been included in the LARC for a long time may not have one.
ITTF Quality Programme For Rocket Coverings everything is written very clearly: "The racket covering which is listed in the LARC is...
Curl P3a is basically medium pips (not long). I play with the "old version", i.e. TSP Curl p3 alpha r-soft (ox), really very fun rubber. True, I also tried Victas Curl p3a, but the difference is huge..tsp I like it better