Efke 100 was an old school single layer silver rich black and white film from the 1950s made in Croatia by Fotokemika. Production ended in 2012 when the factory closed after an old coating machinery broke down and couldn’t be repaired. Fast forward five years, I was hanging with fellow members of the Classic Camera Revival Podcast, and Peter Lee told me there was an Ebay seller with bricks of Efke 100 in 35mm expired in 2015 for sale for about $75 Cdn, shipping included. How can I say no to that?  I bought two bricks a few weeks apart.