I have a 1978 Cal. 1012 with Birmingham hallmarks which is spotless: and have seen a 1958 Birmingham hallmarked Omega at a reputable dealer. Can't really justify both is the 58 a better long term keeper (my birth year)? Apologies in advance for the poor pics. Asking price 895 GBP. I've seen inside the watch and it's all clean. Kept in a draw since the 70's following death of a ladies father. Cleaned and serviced. British Dennison case. Sorry for taking not giving again but you guys have so much more knowledge.