According to the Urban Dictionary Happenstance means happening by coincidence, accidentally and unintended. I think it is a nice word and appropriate here:
Recently I found the Battlo Bench by Antoni Gaudi and shortly thereafter I discovered these are still produced in Spain by BD Barcelona
Bd Barcelona Design is the Spanish company with the highest international prestige in design. It was founded in 1972 as Bd Ediciones de Diseño by the architects and interior designers Pep Bonet, Cristian Cirici, Lluis Clotet, Mireia Riera and Oscar Tusquets. It has been awarded with the Premio Nacional de Diseño in 1989 and the European Community Design Prize in 1990