#594 Or #596 Or Neither?

So I have been into stamp collecting for a few years but inherited a ton of stamps that I am finally able to go through,. So I know the general basics, but not quite specifics.. I have been taking pictures of ones I think are or might be worth it to post to find some help with.. so i'll share the best I can. Any advice or help or information about pics I post would be greatly appreciated. (i am trying to post in the different section categories for each of my posts)

Is there a reason you have eliminated Scott 552 from consideration?.

no no, I'm still learning Scott #'s, hence why I'm posting for help

Always, without any exceptions, show the back of the stamp(s) as well.
This usually removes 99% of all 594/596 candidates..

Several thoughts come to mind here:
1. I believe you would benefit by obtaining a copy of the Scott U.S. Specialized catalog. It has excellent information in the introductory sections on the basics including and identifier section. Used copies, 3-8 years old, can often be located for a fraction of the original cost and can often be found in library sales.
2. Don't get too caught up in "value". In this case, this series of definitives spans 1922-1938+ and spanned the transition from flat to rotary printing, the accompanying perforation rate changes, and sheet, booklet, and coil formats. There are several look-a-likes between the extremely common and the extremely rare.
3. Always assume that you have the most common variety of a stamp and work to eliminate that possibility first, rather than first assuming you have the most valuable type. It will reduce the amount of disappointment, and will be correct 99.9999% of the time.
4. The back side: While drkohler's request may seem odd, flat plate stamps will frequently show ink set-off on the back side from the stacking of the press sheets when printing. Conversely, rotary-printed stamps will not. Showing us the back side of a stamp in question will help us (unless it's on cover of course).
5.Get an actual pair of "stamp tongs" with a smooth inner surface, rather than tweezers with ridges which can damage stamps.
6. Overlay templates for flat/rotary can be tricky. Not just any stamp will do. It is important to know the ID of the stamp used for the template and what it means when overlaid on another stamp.Do you know the ID of the template stamp?