re ;No, Army IDs were OK for going both ways, or even through Italy to Austria, and on a guided commercial tour, you could go from Deutschland to Italia to FYR! (I think that was Slovenia ~ ).
LOL just more proof about one rule for the Yanks and another for us Brits.
When were you out there my tour in West Germany was 1985 to 1987.
Based in Dortmund
68/69, and the rules were different right up to Oct 68 when the Russians messed up Czech. The only place I could go on just my ID and a pass after that were members of the Common Market and to UK.
I would imagine your service operated under those same rules.