A visual pun on the notion of sharpness? Good work (no pun intended, although I'm sure your Grandpa did good work too, if the photo is any reflection of his skill).
@macfred I've started using Rodinal almost exclusively because life and work keep getting in the way of my photography. I hate having a batch of chemicals sit in the darkroom and go bad with age. I developed 5 rolls of film over the weekend, last time I developed film was over a year ago.
@Larry the sailor Same here - only one or two b/w - developers in the shelf (these days Tetenal Ultrafine liquid and some T-MAX developer) in which I soup almost everything.