WWII Mosquito aircraft part S982599A.
Here we have an intriguing original Mosquito part.
The item has several part numbers such as S982599, S982601, S982577. I haven't as yet worked out exactly where this would be located. Interestingly the wooden arm is cut to size in that both ends are cut and not snapped off. The curve plate measures approximately 21cm by 19cm to give you an idea of size. This would make an intriguing display piece for any Mosquito collector