I sat drinking my lemonade and watching the lift go up and down the tubular glass shaft that allowed you to see out into the store as you rode from floor to floor, in two minds whether or not to go up to the stocking counter and see Carola, the girl from Dagmarr’s wedding. It was the sour taste of the lemonade that put me in mind of my own debauched behaviour, and that decided me against it. Instead I left Grunfeld’s and walked the short distance down Kurfurstendamm and onto Schlüterstrasse.

A jewellers is one of the few places in Berlin where you can expect to find people queueing to sell rather than to buy. Peter Neumaier’s Antique Jewellers was no exception. When I got there the line wasn’t quite outside the door, but it was certainly rubbing the glass; and it was older and sadder looking than most of the queues that I was used to standing in. The people waiting there were from a mixture of backgrounds, but mostly they had two things in common: their Judaism and, as an inevitable corollary, their lack of work, which was how they came to be selling their valuables in the first place. At the top of the queue, behind a long glass counter, were two stone-faced shop assistants in good suits. They had a neat line in appraisal, which was to tell the prospective seller how poor the piece actually was and how little it was likely to fetch on the open market.

‘We see stuff like this all the time,’ said one of them, wrinkling his lips and shaking his head at the spread of pearls and brooches on the counter beneath him. ‘You see, we can’t put a price on sentimental value. I’m sure you understand that.’ He was a young fellow, half the age of the deflating old mattress of a woman before him, and good-looking too, although in need of a shave, perhaps. His colleague was less forthcoming with his indifference: he sniffed so that his nose took on a sneer, he shrugged a half shrug of his coathanger-sized shoulders, and he grunted unenthusiastically. Silently, he counted out five one-hundred-mark notes from a roll in his skinny miser’s hand that must have been worth thirty times as much. The old man he was buying from was undecided about whether or not he should accept what must have been a derisory offer, and with a trembling hand he pointed at the bracelet lying on the piece of cloth he had wrapped it up in.

‘But look here,’ said the old man, ‘you’ve got one just like it in the window for three times what you’re offering.’

The Coathanger pursed his lips. ‘Fritz,’ he said, ‘how long has that sapphire bracelet been in the window?’ It was an efficient double-act, you had to say that much.