hey there
i have one of those wollensak triple convertibles that john kasaian & jim galli mentioned. it might be the an earlier vintage than jim has though (mine is olde darkbrass, not shiny aluminium ... ) - just the same, it is a 25-20-13" in a big old betax#5 shutter and it is pretty sweet. i don't have an enlarger and have shot some film with it, but for the most part, i am film-poor, and shoot a lot of paper negatives with it, with no complaints.
oh, the dial shutters like the betax, where there are *no click-stops* (just runs smooth) between the shutter speeds, you may see markings that look like intermediary speeds, don't be afraid to use'em, they are, as ian dury says "inbetweenies."
-john