All About Pocket Knives

I work for a guy who is a knife collector mostly old pocket knifes.
I have some knives he would like some information on as possible:
Possible dating
Manufacturer and info on them
Really anything you can give me would be great
I have taken pictures and will put them as replies so not to confuse which goes with which.

Knife #1

Knife #2

Knife #3

Knife #4

Knife #5

Welcome to AAPK. Most if not all of those are likely from the 1950s, have celluloid handle covers, and were among the least expensive brands offered by the makers. One of the greatest features of this site is the ”search” function which can be found to the upper left above this post, under the “Quick links” heading. Just click on Quick links, scroll down to “Search”, and click on that. Then type the name stamped on the tang of the knife into the search field and press submit. In most cases you’ll get back many posts containing info about the knife. FYI the first knife you posted, which is difficult to read has the “Hammer Brand” stamp.

Most of those you’ve pictured are brand names for which the info you’ve requested can be found readily through search. You may even find examples of the same exact knife as yours. For example a search for CAMCO found this post (among others)

viewtopic.php?f=35&t=8307&hilit=Camco#p69354

Ken

A few of these knives have celluloid covers, which can be unstable. Some of them will break down over time and emit a corrosive gas, which will corrode any metal around it. That John Primble with the red/green/yellow covers looks like it is out-gassing, keep it away from other knives.