I have seen previous posts from Carl Swenson explaining L&H serial numbers starting in 1910 with 1000 or 1100 digits—-serial numbers were 4 digits, and understand that they made about a 100 per year for many decades so you could calculate approx harp age based on this formula. However, when did they switch to 5 digits, and when they did, what was the base from which they began the 5 digits?
Lastly, is there a way to contact L&H and have them give a date of manufacture for a particular serial number?
Wish it did not seem so random. Appreciate any help.
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