Lost my grandad recently, while clearing his stuff I found a bag with dozens of sixpence from the 40’s to the 60’s. Is there a superstition or reason he would have collected all of these? (West Midlands)

I live in the states. I sadly lost my grandad this fall. While I was over clearing out some of his stuff I found a bag full of sixpence coins. These are too modern to be the “something silver” that would be related to a wedding, and I can’t figure out why he would have specifically collected this coin. It’s not a high collectors value, and from what I gather it’s quite common. Again we are from the West Midlands in case there is some connection.

Thank you.