Things are finally beginning to make sense, courtesy of "America's Munitions 1917-1918".
Based on my years of study, I am confident that I can answer ChadM's initial question.
Per "America's Munitions 1917-1918", A.O. Smith was the major, if not sole manufactuer of the 100 pound size, MARK 1 demolition bomb. I accept this as fact, as I have yet to find an image of any other MARK 1 bearing other manufactuer information.
Based on this untouched specimen, here is exactly how the MARK 1, 100 pound demolition bomb should be painted. If anyone can identify the color of the body, this information would be greatly appreciated. Not pictured, the letters "J.C.N" appear on the reverse side of the casing, just below the ceter of gravity stripe.
A.O. Smith, as I said before; was not the sole manufacturer of the MARK 3, 50 pounder. While A.O. Smith produced the greatest number, there were two other manufatures; the Edward G. Budd Manufacturing Company, and Hale and Kilburn.
In this thread's #3 post, you can see how the Edward G. Budd Manufacturing Company example would appear.
I have stated on another thread that one of my MARK 3, 50 pounders had the original paint under newer paint I chemically stripped, and made no effort to preserve in my earlier years as a collector. Here is how it appeared then:
Unsure of the original body paint color, here is how it appears today:
And finally, if anyone wishes to use it, here is my detailed copy of the original nomenclature for an A.O. Smith, MARK 3. (Can be changed to MARK 1)
Furthermore, MARK is not abbreviated as MK on these casings. Use "MARK".
My first two restorations and posts are in error.