Although I am mainly interested in Elgin interchangeables (or convertibles) I came home from the Drawbridge with my first 992B, C308311, looking pretty good in a sound # 15 case which has a ghost of the circular brush marks remaining on the back. The movement looks extremely good; I haven't got around to cleaning and checking it out yet. The dial is undamaged but imperfect porcelain--the last letters in Special are slightly lighter than the rest of the printing--and it has two-thirds of a set of fine black hands.
I've made the rounds of the parts suppliers that I know of and have struck out. Would one of the Hamilton specialists be so kind as to sell me a black second hand, the longer length for the Heavy Gothic dial?

How did you know it is melamine, Mr. Riddell?
I cleaned the escapement parts and jewels, oiled and reassembled, so I could find out what adjustments the watch needed before I cleaned it for real. After putting it in beat and playing with the meantime screws a little, I had to use the setting on my old TickOPrint that multiplies the errors by 10 in order to see whether the watch was a little fast or a little slow. That was in all 6 positions. Heckuva watch.