Few more knives I need help dating

[spizebrad]

Hello again all! Posted a few knives from my great grandpa’s collection recently and got some great responses so thought I’d give it another shot with a new knife and a I didn’t get an exact range on for a second opinion.
The first one is a Keen Kutter. The tang stamp reads the following in what looks like a downward arrow sorta shape
EC Simmons
Keen Kutter
St. Louis
MO
Next is a challenge knife. It has the name “JD Van Hook on the scale and the tang stamp reads:
Challenge
Cut co
Bridgeport
Conn
Next is a IWostenholm IXL. On the last post I had somebody guess it was pre 1891 because the country isn’t stamped on it but just seeing if anybody else has any inferences. The tang stamp reads:
George
Wostenholm
IXL cutlery
Shaffield
Is a little Uster that reads:
Uster
USA
Next is a smaller Utica. The tang stamp reads:
Utica (curved)
Cutlery co
Walden NY
Thank you all in advance for any info you can provide! Trying to surprise my grandma by lightly cleaning and identifying all her dads knives!

[peanut740]

Challenge went out of business in 1928.

[danno50]

The Keen Kutter is the same knife you asked about in a previous topic.

viewtopic.php?f=4&t=68950

I just added some additional comments in that topic.