For many years boats called a GUARDIAN were built by Boston Whaler in the Commercial and Government Products division, but still part of the operation of Boston Whaler. At some point--I do not have the precise timeline--under Brunswick ownership a new operating division was created called Brunswick Commercial and Government boats. Exactly who would have data about the GUARDIAN 19 you are asking about would depend who built the boat.
One way to quickly tell is from the federal hull identification number (HIN) and the manufacturer identity code (MIC) contained in the HIN. If the MIC is BWC then the boat was made by Boston Whaler. If the HIN is WCG, then the boat could be from Boston Whaler but made by their "Whaler Commercial Government" side operation or by the later named Brunswick Commercial and Government division. That entity would have more information about the boat.
Also the HIN will contain the month of production and the year of production. See my remarks in reply to your Q2 below for help in interpretation of the federal hull identification number coding.
Hawkeye wrote:Q1: where can the specifications for a GUARDIAN 19 be found?
If the HIN indicates WCG, try the Brunswick Commercial and Government Boats website:
https://www.brunswickcgp.com/boston-wha ... rdian.htmlHawkeye wrote:Q3: where can information related to the hull serial number be found?
If you are talking about the federal hull identification number (HIN), read the FAQ answer at
Q2: Where is the Hull Identification Number?https://continuouswave.com/whaler/reference/FAQ/#Q2If you are talking about a hull stenciled number that was molded into the hull--if there even is one--generally there is not any on-line information about specific hull stenciled numbers. There is only a general guide to the different blocks of stencil numbers and which models there were used with. See the FAQ at Q2 as linked above. You need to read the entire FAQ Q2 answer carefully and for comprehension if you want to learn how to interpret the HIN or the stenciled number. Follow the links the the FAQ to the resources available.