I was perusing the New Vanguard "T-72 MBT 1974-93" by Steve Zaloga and came across this one-liner in the discussion on variants: "Czechoslovak T-72M1 tanks were also apparently provided to the USSR." There was no further elaboration.
The book is a bit dated, so new information may have come to light, and I'm curious - assuming the statement is accurate - how many of the Czech-built tanks did the Soviets use and in what capacity?