Late Roman Bronze Coins

I have the following coin catalogued as RIC 135 I.e. Bust B6 left (bust laureat wearing trabea) and am curious as to whether anyone can advise the distinction between this and K1, laureate wearing trabea? There is no reference in RIC for a K1 bust in this issue, but I figured a good opportunity for clarification

It also appears that whilst included in RIC, this bust is not listed in Bastien?

Excellent coin. Sorry, I am not really answering your question, but this is one of the rare occasions you get to see such an interesting issue.

Super coin...I think that the busts B6 and K1 must be the same, except RIC failed to note it. There are other busts in RIC VII which are the same but they are noted, like Q2 is the same as L6, Q3 is the same as I7. Bastien does not list RIC 135, but includes it in his #88 because he says the example cited in RIC from Rome is actually holding a sceptre (K3)

Thanks for the replies ... So I have a coin that's in RIC but only in error, so its not in RIC