How many cards in Lexicon word game?

I have a vintage set, with 52 letter cards plus one Master Card. Letter distribution is: AAAA B C D EEEE F G HHH IIII J K LLL M N OOO P Q RRR SSS TTT UUU V WWW X Y Z. The rules booklet does not state how many cards in the set, but it does appear to be complete.

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According to Board Game Geek, there are 54 cards: A-4 B-1 C-2 D-1 E-5 F-1 G-2 H-2 I-3 J-1 K-1 L-3 M-2 N-2 O-3 P-1 Q-1 R-3 S-3 T-3 U-2 V-1 W-2 X-1 Y-1 Z-1 Master-2