Thanks for the additional photos Jason...and your way too kind words towards my humble appearently neverending website project, much appreciated

I have been fortunate enough that the windups here all have arrived in fully functional condition, but good to have some inside knowledge to lean on, should i end up with one in need of service eventually.
Have no intention of modding a whistle into anything, and have mostly been looking for a nice Mercury with one.
The Mercury loco is still unrepresented here, for that exact reason.