If he rode it just 3 times from new, it might mean the special "Chromavelato" paint finish and the decals could very well be original, and the bike would be higher value than most other Montellos out there with the typical flaking off Chromavelato paint and decal work.
If you are not planning to ride/own it and would want to retain top value for resale, be gentle with handling the bike to preserve the great finish and graphics. Do not leave it exposed to too much UV light and heat like in a hot attic.
Especially watch out for that loose chain so it does not scrape against the frame or any other parts on the bike.
There Delta brakes and what might be a C-Record drivetrain is major icing on the cake.
Your dad had impeccable taste and that's definitely a Pinarello grail bike he built as all the boxes were ticked!
Last edited by Chombi1; 01-04-22 at 11:45 PM.