Bidspirit auction | A set of four white

A set of four white and dark blue ceramic miniature houses with yellow chimneys, marked 'BOLS', 'AMSTERDAM 1575', 'KLM', 'Blue Delft exclusively made for KLM by BOLS AMSTERDAM 1575', 'HKDNP', and numbered '77', '71', '84', '79' with associated years '2010' or '2009'.