This is the original kitchen sink at our cottage; most local houses have the same. No hot and cold taps, no stainless steel plug-hole, no sophisticated plumbing system to take away the used water.
There used to be a tiny 'playing-card' sized open hole 'window' behind it, to allow the poor housewife to see what she was doing; I cut, and installed, the slightly bigger glazed stone window that now replaces it. The two side stones are the 'draining boards', and the middle stone (which has a shallow 1 inch deep interior) is where all the daily work was done.
What a hard life those women must have led. This rustic stone sink and her huge open fireplace were the only 'luxuries' she would have had with which to run her household...... and people today complain that their all-mod-cons kitchens need replacing after just a few years usage.