Rd 400 serial number dating
The instrument itself was entirely handcrafted in Shanghai China.
We run a small workshop in the "Jiading" region of Shanghai.
They seem to reflect only the number of machines produced whilst each letter was in use. (Info from the Nottinghamshire Archives) A new numbering system was introduced in 1955, though this ran concurrently with the old one for two years. Reynolds 531) frames, and involved the placing of a character at the beginning of the serial number.
The new system involved a second running letter, added to the first, which began at the start of the alphabet. The character began at the start of the alphabet, and indicated year of manufacture.
The final product was brought in to our Hayward, California warehouse where it received an in-house setup from our US staff before being sent to Stan. would still like to know who was involved - by name - but that's probably might be asking too much.
Note: While this numbering scheme is generally true, there may have been some crossover use of letters at the beginning/end of each year (e.g.
does the serial number of my LM-600 indicate when and where the mandolin was made? Maybe the "numbering system" has changed with that.