Cabinet SN 41110 Model 1G+1H is from around June 1972.
Speaker code 67-7230 means Eminence 1972 30th week.
Ok - here is another "Kustom mystery".
For some reason Kustom kept making the "old style" K100B-5 and K200B-5 PA heads long after they had stopped making the non-PA K100 (~Aug 1971) and K200B (~Feb 1972).
Kustom made the "old style" K100B-5 and K200B-5 PA heads until at least April 1973.