Grandma is 98 if the tools are her dad's it can quite easily be 100+ year old.
Grandmas 98 now, IF her father bought those tools before she was born, MAYBE over 100, but I think it highly unlikely... Her dad had a whole lifetime to collect those tools before passing them on. People back then had kids young, and were for the most part dirt poor. Then they had to go through the depression, and many lost everything.
Moreover, Every tool there with the possible exception of the wrench are still made today somewhere. Even the wrench was still being made and popularly sold at least until the 40's.
Over 50-60 years old? I'll buy it. Over 100? I strongly doubt it. I have a number of tools over 100 years old. Its not that easy to find pre 1912 tools, particularly in the condition those appear to be in...
Don't get me wrong It's a nice little collection of some family tools, and as such have good value to the family, but I'm not deluded by Grandma's age as to the tools age.
If those had belonged to Grandma's Grandpa, then maybe...