I have a beautiful color reprint of the Hercules Gas, kero and oil Engine Catalog #26. It is  34 pages. Face stapled and front and back are card stock. Really nice color pics of the different engines from the 1 3/4hp to the larger 14hp ones. Has the kero and oil engines too. Even covers the UA models. It covers all the stationary and portable ones. All sizes are mentioned with alot of pics and specs for each to include the tilt saw rig unit. Some specs and info on the different models. It measures 8 1/2" by 11".  a great addition to any collection.