Bols Z.O.Genever Stone Clay Bottle with Contents

I have just discovered, while clearing out the garage, a small clay bottle of Bols Z.O.Genever. The bottle measures approx. 12cm x 4cm.

There is a date on the label of 1 January 1868 however I do not know if this is the production date. The bottle and label are in good condition. The cork attached to the lid is damaged but still seals well.

The bottle is also approximately 1/2 to 2/3 full of alcohol. I suppose there is the possibilty that these are not the original contents but I think it's just as likely that they are.