Need serial number id please

[Dan Burke]

Evening folks, this is my first post and I've spent quite a few hours since finding your site yesterday reading and enjoying the conversations. I have a favor to ask as I now have the Parker that had belonged to my grandfather and his. I'm trying to figure out what gauge it is as I only have 12 ga ammo. It is smaller than 12 but not a 20 i think so the best guess was a 16 but now i see there were some 14 and 18's built also. I'd like to have make this a shooter again but its going to stay in the safe if its an oddball :-) The Serial is 57087 and is on a #1 frame and has a number 2 above the serial on the water table. The flats are stamped 4 6 which is the weight i'm guessing. There is also a silver shield inlaid on the bottom of the stock in front of the butt plate. It has a black butt plate with a dog with bird in mouth. I'll post some pic's but have to wait until monday for the bank to open so I can get to it. Our library does not have the Parker Gun Identification & Serialization book and I don't have the extra for the price on Amazon. I'm hoping to bag some birds with this later in the year and then let my sons do the same so 6 generations will have used this double, and well earned its keep. Thanks in advance, from my reading your a great lot