Over 600 photos in each volume. No duplications between the two. U.S., foreign and Confederate, from the era of the wheellock to the Warsaw Pact. Covers ball screws, wipers, mainspring vises, rods and thongs, oilers, combination tools, jags, wrenches, tompions, tool sets, brush and pick sets and much more. 367 pages, 5 1/2" x 8 1/2", softbound.