hello,,the 1G indicates the year of production as 1962 and it is a A-5 auto loader,,value for a belgium light weight in the condition you say yours is in would be 400-600,,any browning has value and if your planning on keeping it then i'd either refinish the stocks to suit your needs or pick up a set of new stocks and keep the originals as a backup or if a collector want them if you sell it down the road ,,it won't hurt the value and it sounds like it needs some TLC,,but also sounds like it may have had a day or two in the feild and must work good and did its job well to be in the condition you say yours is in...