I would love to have an example of a Wolf & Klar catalog. Thanks for posting that page out of it. Neato to see the reference to the Triple Lock right there in the catalog.
"... a general favorite on the market previously and is still remembered."
Search ebay for catalog reproductions. There's a company called Cornell Publications; call Abby at 810 225 3075. They have hundreds of reprints and very inexpensive. If they don't have it and an original is loaned to them, they'll copy it and you get your copy for free.