I agree. In engraved, interlaced, three-letter monograms in this style, the last name initial is usually centered, and often accentuated by cross-hatching, the first name initial on the left and the middle name initial on the right. CFL.
No, that is a number assigned by the U.S. Navy.
The Chelsea serial number is stamped on the movement, and often the back of the case.
I was mistaken.
Ken's Clock Clinic that specializes in restoration of these notes "Both the Spider and Wasp were gold-plated with a glass sleeve, and the movement can be seen through the glass.... Most of the internal parts of the movement do not appear to have been gold plated with the...
I understand that Chelsea platform escapements had been originally supplied by the Waltham Watch Company, and are now obtained from Switzerland.
The joy of sailing downwind in calm seas - with the tintinnabulations to celebrate the passage of time and space!
A boat deserves a fine clock.
A marine chronometer is not needed for calculating position. A global navigation satellite system (GPS) is commonly used these days: Satellite navigation - Wikipedia
If you are looking for a mechanical ship's clock (or a quartz one) you may want to learn what is available and what they sell for...
A replacement dial can be hand-drawn in permanent ink (Using a technical pen, rule, and compass, romans are easy.) or printed from a suitable dial pattern - either on archival stock that reflects its age. Seal with a clear varnish.