Are there any passenger aircraft with no cabin access to/from the cockpit? Most passenger aircraft (airliners and business aircraft) have an internal door or doorway connecting the cockpit area to the main cabin; are there passenger aircraft where there is a solid partition isolating the cockpit from the passenger cabin, and passing between the two requires exiting the aircraft?

Yes, I know that many early passenger aircraft had enclosed cabins with separate, open cockpits; I'm wondering about aircraft with an enclosed cockpit and a separate, enclosed cabin.
The only one I can think of is the Junkers F13. It has an open cockpit and an enclosed 6 passenger cabin. There's no access between the two areas; only a small window.  


Credit:THOMAS LÜTHI / RIMOWA 2016

The CEO of Remowa is having recreations made of the aircraft which first flew in 1919. It was (according to Rimowa) the world’s first all-metal commercial aircraft.