Had a rummage for cranks around the right age / reasonably in keeping. Would be the worst poll ever, as pretty much left with a choice between a specialized strongarm and a shimano m510. So if you're minded to call it for me I think that bike would originally have had a strongarm crank, possibly a 5 arm (could well be wrong). Also have the black strongarm2 crank currently on my white Stumpy, that I could rob if worth the trouble, as this bike gets cranks swaps whenever the wind changes direction anyway.Even better, you can set up a poll on a thread (although never done it myself) so you can get an expert panel decision.
Don't listen to anything I say, I like Raleigh's!