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1910 RWS Crackle back (Pam A) tarot deck with dark blue case

1910 RWS Crackle back (Pam A) tarot deck with dark blue case
1910 RWS Crackle back (Pam A) tarot deck with dark blue case

I have an original vintage 1910 RWS crackle back (Pam A) set of tarot cards in its original dark blue slip case that are in excellent condition. How can I find their value? I know they are very rare but cannot find another set to be able to value them. Any suggestions?