That's just beautiful. I love that it belonged to your grandad.
That's how they built things back then. I grew up on a farm... it's been in our family for 140 years now... it had a HUGE barn, built in 1922 by my then 14-yr old pop, his father and two carpenters. Every cut was made with a handsaw, every nail driven by hand. In this day of power planers, nail-guns, etc., it's a sobering thought.