Bulova Vintage 1972 Bulova Accutron N2 Tuning Fork Electronic Watch Cal. 218 Swiss Rare

Vintage 1972 Bulova Accutron N2 Tuning Fork Electronic Watch Cal. 218 Swiss Rare I bought them at an estate sale. I managed to open them, but there was no battery inside, so I couldn't test whether they work or not. That's why I'm selling them for parts.