reminds me of one of the Nigel Rees graffiti funnies..........be 'a lert' - your country needs 'lerts'.
sorry, hadn't responded as this ended up an embarrassing piece in my memory ---- should have taken jp's offer and flogged it to him and taken a lady away for the weekend - would have been more enjoyable than the glass

. Thinking I'd never part with anything, I hung on to this for a couple of years and then, sinking slowly in a morass of glass was forced to send it to auction - and it didn't make good money - so serves me right for trying to be clever.

In the event I've dropped colleting all but U.K. material - but that's not to say I wouldn't buy another of these or similar should I see one at a boot sale - I'm a lot wiser now than I was then.
So, regret I can add nothing further - but would like to record my sincere thanks to Dirk for providing the answer in the first place.