Need help identifying pocket watch ref. 4114

[myasnik]

Hi all!
I am asking for help in identifying a gold Rolex pocket watch. If I'm not mistaken, this is the Prince Imperial model.
Rolex chronometer
18 jewels
Movement serial number: L 52745
Case serial number: 443775

I have a few questions:
1. What is the name of the movement caliber?
2. What is the approximate year of production of this watch?
3. What does the letter “L” mean in the movement serial number?

The fact is that the tables of serial numbers that are on the Internet, if I understand correctly, refer to wristwatches. Isn't it?

Best regards,
Dmytro.