Yes, Bay I (bay one) is the same on 'Cords and 'Flexes. For hoods and filters. YashicaMats and Minolta Autocords, among others, also use thie same size mount so if you see these cameras listed, all is good.
There are two styles of hoods. The recent plastic ones attach to the inner bayonet section and do not let you use a filter and a hood at the same time. The 'classic' metal hoods mount to the outer bayonet and let you use a filter on the inner bayonet at the same time.
There are also Bay I to threaded filter adapters. If you have a bunch of 49mm filters, for example, this is another approach.