Junghans Tambour Mantle clock

I have recently purchased an antique Junghans Mantle Clock..It has the 8 point star with J in it on the face as well as stamped on the backing plate. Numbers are on backing plate as follows (under star) 34 8 then 183/40 over 92. Can you help me identify the age of my lovely clock please? It now has it's Westminster chime back in place but I haven't got a pic with it in.