I found a silver tray in the attic-- it's from Child's international silver co. it is silver soldered and not decerated kind of plain the number on back is 05002. It says 20 in by 23 oval shaped. I would like to know how much it is worth?

Is the word Child's on the line above International Silver Co.? I suspect that it is just International Silver Co. and is either a child's tray from a tea set or a local jeweler named Child's, who engraved his name above.
Without a sterling stamp, it isn't worth much at all, sorry.