Hi all,   Just aquired this one. Lachenal G/D 30 key mahogany ends #155862. It has no makers label but has Lachenal's trademark on the right hand side strap bar. It has dark red leather sheet glued aroud the keys. I have seen some earlier models (serial numbers were around 130000's ) with mahogany end with different (simpler) fretwork.   Is this fretwork (and leather sheet) typical for 150000's instrument ? or may spacially made for a certain dealer ? There are some pencil notes inside of the reed pan. ( I couldn't read it )   Any information will be appreciated.   Thank you.