No serial number provided
No published sn data. 10-50 USD
No published sn data
35 is the minimum age for the US president.
18
Inexpensive turn of the century +/- a decade or two revolver. Seldom exceed 50 USD in value
Despite the markings, these were not made by Smith & Wesson (marking refers to the caliber) and they were not used by the US Secret Service. Depending on condition and finish, these are typically $50 to $125.
made June 1918
It is pronounced as "pri-mi-ser-ee-us."
Well, those are 5 chambers, not 5 cylinders. Bearing NO connection to the US Secret Service, the name was used by both A J Aubrey and Harrington & Richardson. Value is in the $100-$150 range. Think the term you were looking for was top break revolver.
up to 100 each
Try oldguns.net
Depends on the country you are talking about. In the US, the minimum age is 17 with parental permission. Maximum age varies from service to service and can be as low as 28 for the Marine Corps to a high of 42 for the Army.