Yes, love that old crank. (Congrats to the OP for getting the nuts off.) They were wonderful for 1970s-style loaded camping-touring. 48T outer, some convenient middle, 26T inner, what's not to like? Rings lasted a long time, still have them. Sadly, pedal broke out of the eye of the left crank during my last year commuting before I retired in '16, just as I stood up to climb an overpass. Ouch that pavement is hard. Fortunately no cars behind me and no injury. (The fractured bits show the usual old surface + new surface appearance so it was likely a fretting crack that propagated into the crank until pop---> splat!)