That razor seems like it would be great for learning. A 5/8" round toe Solingen blade, I don't think you could ask for too much more. Though I don't think D. Peres is a famous blade, that doesn't preclude it from being a good shaver.

You might need to accept the idea of mailing it off to be honed. There just aren't many people able to hone razors anymore. Have a look in member services on this website for a honmeister. I think there is someone in Norway, if I remember correctly.

You might consider having a light restore done on the razor since it was your great-grandfather's - clean and polish the blade, clean and polish the scales, reprint the scales...it would be kind of a nice thing to do, since it is a family blade.

Darren