This blue label has a cutoff circle. Actually, many copies have cutoff circles
https://comics.ha.com/itm/golden-age-1938-1955-/batman-13-dc-1942-cgc-vg-40-off-white-to-white-pages/a/110054-14119.s?ic4=ListView-ShortDescription-071515
Gang,
You CAN NOT tell if a book is trimmed comparing artwork. EVER.
Comics vary so much from issue to issue because of large production tolerances that often two copies of the same book will vary either in size, how they were cut, how they were colored, etc.
The only way to tell if most books were trimmed (unless it's an obvious trim job) is by examining the book in hand.
Comparing one book to another is not a viable method.