Hey there! So I am new to the world of pens. I was cleaning out my grandmother's house when i came across a collection of antiques that belonged to her father. I dont know much about him, although he was some what wealthy. Within those antiques were several Waterman Pens. One of them caught my eye. They all had his name engraved on them but this one, upon further research, i could not find. It is black and gold, and has the number 53 marked on its bottom. Any idea how much it is worth? I see there is no #53 anywhere? Thanks! I attached photos as well! Best regards, Greg