Bonnet Badge?

[BobTaylor]

In my glove box I found what I assumed was a new spare bonnet badge, but it is slightly smaller than the one on my car and just has two small lugs on the back as a push fit. Any suggestions as to what it is for?

 

[arthuy]

SD1,quite rare now too worth putting it on ebay.

 

[BobTaylor]

SD1,quite rare now too worth putting it on ebay.

Thanks for the identification, not much use to me, I will try eBay, thanks.