Help To Distinguish If These George Washington Stamps. Scott544 Or Scott 545?

Hello,
Recently, I received a large lot of George Washington Stamps, including coils,precancels, shermacks,in used and unused conditions.
Could someone please inform me if any of these may be possible Scott545's or Scott 544?. All the stamps within the group are perforated 11 on all sides. I went to Stamp smarter, however,I am having a difficult time distinguishing the color.
Any assistance would truly be appreciated. Thank you

Is there any set-off ink on the back on any of them? What is the design measurement on each one? Have you used the search function (box toward the top of the page) for other posts regarding 545 and 544 and read them--that might help you some.

Thank you for your response,Al. Appreciate the questions you asked.Allowed me to see more in detail the differences btw rotary and flat plate. with perf.11 GW1c stamp. Rotary is usually taller and wider (19 x 22.5,or19.5 x22) Flat plates have dots on back of them (19x22)
After conducting the mock cut out of a G.W.1c they seem to beScott498's.They definitely have ink sets in the back, for example the precancels below. The first one is very obvious, however, the second one, "Boston" I had to scan to make better view.The Boston precancel was taller, but still has the ink set in back. This stamp still has shine like gum on it. The color is still different from the others.
Will continue to look threw them. Stamp Smarter is an excellent guide to help inform about what one may need to see to tell the differences.

The set-off Al is referring to is very evident on the 1st stamp above so must be a flat plate print. The 2nd has some possible ink marks but hard to tell from the small scan. The set-off is due to the sheets being stacked before the ink completely dried. Another way to tell the difference between the flat plate and rotary prints is the detail in the engraving. The flat plate stamps will generally have sharper impressions showing finer detail.

Not exactly true. Early rotary press stamps have sharper, narrower lines with more ink wash in unprinted areas of the design. To my eye, flat plate printings look blurred compared to rotary press because the lines are wider, stronger and have less edge definition. I use a 15 power loupe or a 10 power measuring loupe to examine stamp details.

Among my flat-plate and rotary-press 30¢ buffaloes, the flat-plate seems somewhat sharper, on certain areas and features...





On the other other hand, I have noticed what I describe as the fine wire-like lines of certain 1¢ Franklin rotaries either of the late 20s or early '30s that I've seen online; although rarities they are, if I'm not mistaken.