Ernie Ohrt was indeed the brother of Hans. Hans coached the Olympic teams for the USA, '56 and or '60, maybe more. Hans died in the 60's. His shops continued on run by family till the late 80's or even 90's. Ernie Ohrt's shop was closed before I was aware there was one, other than seeing a bike with the shop transfer. As Hans imported and sold bikes from a number of makers, including Bertin, you might see if your bike compares closely to Bertin models.