I have a 4.5 x 5.25 welding lens. A couple corners are chipped and i cant get all the numbers that are etched in the top left corner. It is a glass lens,dark blue color with a blueish arc glow when welding, and the last numbers/letters i can see are 10JP1. It may have more in front of those but the corner is chipped. I really like the lens tig welding and was goin to get some more if i could find out what kind it is. Seems to be a #10 shade. Thanks for any help