hello John, I need help dating this P100 I bought today. I found 2 letter stamped on the barrel, "JH", which I think may be a date code. what is the month/year of mfg? is the first letter the month OR year? I am used to remingtons which is 2 letters, month first then year. I hope you can help me out on this, it is one beautiful pump in about 98% condition. thanks in advance, JON PIERCE Winder ,Georgia