Hi all. I've been clearing out some items recently, and I came across a sealed bottom bracket, similar to the Mavic sealed units, but silver and labeled with Stronglight and Spidel on the end bearing covers, along with 35 x 1.00. Instead of the champhered lockrings as the Mavic, these are just typical lockrings like any bb would use. The rings thread onto the body like the Mavic units, and sandwich the frame similarly. Does anyone know the era? model? etc? Thanks.