Thank you DR, I stand corrected.
OED [1933] has:
"...it is used to render two quite different words 'aclys' and 'caestus' the latter app[arently] through doubt as to its meaning." Cf the following:
1696 KENNETT Rom. Antiq. (1713) 255 The cestus were either a sort of leathern guards for the hands, compos'd of thongs and commonly
filled with lead or iron to add force and weight to the blow: Or, according to others, a kind of whirlbats or bludgeons of wood....
....Used to render caestus CESTUS partly through misapprehension of its meaning....
....1603 HOLLAND Plutarch's Mer. v. iv 773 Flinging the coit of brasse: yea and as some say at hurl-bats and fist-fight. 1609 Anon. Marcell xxx. ix.392 The moving of his armes, laying about him as if they had been fighting at hurlebats..."
There is more but it all relates to the other, conventional rendering.
I should have checked earlier but the book is so heavy to pull from its casing that it takes a toll on my constitution!