I performed a research of early 19thC spinning wheels for you.
The initials are those of the unknown craftsman that hand made your spinning wheel.
The 1838 is the date it was made, not a pattern number as one might find on newer devices.
Yours probably had a what is referred to as a "bird cage" attached to it.
If yours does have it, then it is cut off at the top of the picture.
This style if for spinning flax.
My research of current retail prices indicates that your spinning wheel has a retail value of $600-800 depending on condition and location.
A private seller to a dealer or at auction can expect 30-60%of retail value.
I hope I have helped you.
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