Age of Chappell Upright

[Samwise Gamgee]

Can anyone help with this one? We have just purchased a second hand upright Chappell. There are two numbers one on the cast iron chassis : 081150 and another number on the inside back near the bottom of the piano 8611170. Both numbers are stencilled ink. The first number was suggest a manufacture date in the 40's. This just can't be so, judging by the shape and appearance of the piano compared to the photos of 2nd hand ones for sale on the web, and also what seems to be modern materials of construction internally. The second number does not correlate as a Chappell serial number. Are we looking in the wrong place for the s/no? Any help gratefully accepted.