Frank, many thanks to you for your help. The origional bulb was a Phillips (Ford product?) made in France. The replacement is a Sylvannia, made, well, when I get my bifocals clean enough I'll find out.

Replacement wasn't too bad. The speaker pops out without too much fuss, the pull tab with instructions is a nice touch. Spent an hour out on the blueberry barrens to limber up the digits, and the change went more smoothly than the position bulbs. Once again, many thanks, Frank.