The one with the maroon leatherette is a model XII from 1933, and the one with the gray leatherette is a Model XII-A from 1935.
The maroon XII, which originally had a screw-in hose, has an aftermarket adapter for a standard click-in hose; the XII-A, the last version of the XII, came with the new click-in hose as standard equipment.
The maroon Model XII is missing the rear cover.
Neither is worth anywhere near $300.00.......