No ratchets/clicks on 5513 bezels?

Hey all,

Never had a chance to handle a vintage 5513 (1968 production) sub in the metal until a few weeks ago, and I was surprised to discover that the bezel rotation had almost no ratcheting or feeling of detents in it. Is this due to the watch being 50+ years old, or were all of the old Subs designed with friction bezels with no clicks?

The four-digit Rolex Submariner bezels were assembled as a sprung, friction operation.
The bezel is clicked onto a retaining ring that works double duty - compresses the acrylic crystal for water tightness and acts as a base to the bezel. Between the bezel and retaining ring is a round spring (kind of shaped like a taco when bent for spring). This creates friction between the bezel and retaining ring by pushing them apart but not so hard the bezel clicks off. The idea is you push down and rotate to overcome the friction and spring. With age the spring wears out or flattens and the bezel moves loosely. This can be fixed by rebending the spring or getting a new one.

I believe the 16800 Sub was the first to use a unidirectional bezel.

The system changed all at once: ratchet, unidirectional bezel and sapphire crystal. The very same system that was in use up to the 16610.