Might be simpler to explain if you keep using single symbols for digits, like modern base 36 or 64, instead of mixing positional and nonpositional numerals.
Did you genuinely find it difficult to parse the comma delimited representation near the bottom of the article? Just curious. It seemed very natural to me, a minor variation on British style thousand separators.
Maybe ':' would be a more familiar separator because of hours, minutes and seconds (yeah, hours don't go up to 60, but whatever).
Myself, not really given the context in the article. If I was shown this without context it would be pretty confusing. Using : would be better as or would suggest clock which is base 12 plus base 60...
Letters are clearer still if given the base identifier - commonly subscript number.
The suggested notation would make for interesting puzzles.