Dray Prescot series, Delian Cycle by Alan Burt Akers, Orbit

From Wikipedia:

The Dray Prescot series is a sequence of fifty-two science fiction novels and a number of associated short stories of the subgenre generally classified as sword and planet, written by British author Kenneth Bulmer under the pseudonym of Alan Burt Akers.

The first four books in the first subseries – also known as the Delian Cycle – were published in the U.K. by Orbit Books, with cover art by Chris Achilléos. Titles and author name are set in a phototype version of Gothic Bold, originally a wood typeface first shown in 1889.

Or maybe it’s two different phototype versions? If you look closely, you can see that the letter W on the third cover looks different from the one on the fourth. The heavy variant in “Warrior” matches Skidoo Caps, a variant shown by Lettergraphics in 1968. The W in “Swordships” is the one found in the Headliners version named MP 334, which stays closer to the original.