FYI–
NEW YORKER BOILER DATE OF MANUFACTURE INFO–
UNSCREW TOP JACKET COVER: THERE WILL BE A PLATE WELDED ONTO THE TOP OF THE BOILER WITH EITHER:
A “YB” (YEAR BUILT) NUMBER OR A SERIAL# STARTING WITH A 2 DIGIT YEAR
Hope this helps - 
Hi! Bill;
Why are you taking the jacket off ???
Above & beyound:roll:
True Len. The top cover is usually only held on with two screws. Besides, what’s wrong with exceeding the SOP now and then? 
You’d better leave that jacket on today, it’s chilly outside!!!
Mic
But it’s nice and warm inside!!!