PRS AUTO, LLC. Prs Auto, LLC is a Washington Foreign Limited-Liability Company filed On July 8, 2019. The company's filing status is listed as Active and its File Number is 604482907. The Registered Agent on file for this company is Candice M Woods and is located at 1131 Sw Klickitat Way, Seattle, WA 98134. The company's principal address is. This Is A Very Simple Formula. PRS serial numbers are very easy to figure out. The only slightly confusing thing is. 1985 guitars start with the same number as a 1995 guitar. 1986 guitars start with the same number as a 1996 guitar 1987 guitars start with the same number as a 1997 guitar etc. etc. All you have to remember is, guitars built in.