I was/am still struggling with the whole 'thickness' thing especially on the older coins where a thick letter is often just
PMD when examined closer, but finding this one definitely helped me better understand what I'm hunting for.
I was recently given a pile of old coins including liberty/Kennedy/Ike halves, liberty quarters, buff nickels, merc dimes, and a big coffee jar of wheaties. It's a slow process but since I'm still learning I sort by year and look at all the pics on the CC site first and then examine each coin for that year...then do it again for the next year. So, yes this did jump right out.
I'm also building an excel spreadsheet for the cents as I go and noting for each year/mint whether there's obv/rev/mm recorded, any oddities like eyes,ears,etc., so when I'm back to bank box searching I have a quick ref guide for these older dates.