Back here I posted about what was in a box we brought out from a wardrobe to show a friend. There was nothing of value.
What we have that is of value was my non smoking grandmother's ashtray, used for visitors who did smoke. I remember reading how in The Netherlands, if you invited people to your home, you supplied drinks including alcohol, food and cigarettes, the latter usually in a decorative case. It was an insult to your hosts to bring your own (byo), as is done here. Now you may get food here or it might be 'ladies bring a plate', but bring your own drinks and if you smoke, go down to the very back of the garden so there is no smoke drift to the house.
It is cracked and chipped. I took it to Melbourne's finest china repair shop about ten years ago and it was valued at about $100 and it would cost about $100 to make invisible repairs. I didn't go ahead. Maybe its value has risen since then and I am sure an invisible repair cost will have risen muchly.
It has great sentimental value to me.