The 556 number is probably the table style number as most 20th century furniture has !! The information on the glass is pretty self explanatory,, #18133 is most likely the replacement number should any of the glass get broken !! 1/4 in. Golden Topaz color, size 17X15/16 with a 1 In. bevel and a carton of 2 !! does that match the table ?? You could possibly look the table up by the brand and the style number 556 !!
No….but I have the extra glass panels that match the panels in the table in the original boxes from Mastercraft. There is the number 556 stamped into the bottom underneath the table. It also extends to accept a leaf. I believe the leaf is missing and that the extra glass I have actually goes to the leaf. I bought this as is at an auction