Ilford Movie film, (I have a roll of Pan-f I got somewhere)
1) "ilford Safty film" will read right from the emusion side
2) BH perforations
3) the many digit number will be one digit different on your next roll. that is the "footage Number" that would be used in editing. They would print a work print with the numbers printed through, edit the work print and then use those numbers to cut the camera negative to match. the number should also read right from the emulsion side.
the "B" probably indicates the film type But I don't have my old data sheets handy, (I have the compact Photo lab index on my computer, but I does not have the type codes.)
in those days you had the choice of Pan-f, FP4 or MarkV