I own dumbbells that belonged to my father. It was made in cryolite factory in 1990 by my father and grandfather. It has simple forms: sleeve with thread and bagels, but there is no need to comlexity - it just works! Maximum weight of one dumbell is 23 killograms. I usually use it as 13 killograms.
I inherited it from my father. He used to do sport with them when he was young. It was bequeathed to me when I moved to Yekaterinburg. This dumbbells always remind me my father and his strength.
My father asked me not to sell this dumbbells, I will always treasure it. Now, I guess, it is our family heirloom. I will be glad to bequeathe it to my children and their children. I hope there will be at least one boy in each future generation :).