Polybius coordinates plus a repeating numeric key, added digit by digit without carry — Vigenère on numbers.
polyalphabetic substitution cipher
medium to break by hand
Russia, 1880s
Russian Nihilist prisoners smuggling numbers past the censors; a forerunner of the VIC cipher
encrypt · decrypt · cryptanalysis
The stream has 0 numbers. A repeating key leaves periodic fingerprints — pick the period the cards rank highest.
Too few numbers for a period analysis — paste a longer cryptogram.