My guess is these space clocks were flown on Mir and other Soviet manned space vehicles. They all have the same form factor.

(1) Black analog display, 4 dials

(2) White analog display, 4 dials

(3) LED digital, dual display

(4) White dial analog display with Nixie tube (?) digital display

(5) LED digital, single display

(6) Black analog display, 4 dials

(7) LED digital, dual display

Above photos courtesy of Aleksey Skuratovich as posted on eBay.