SUMMIT 170
The S.170 is a rare visitor to collections. It is a button filler, and I have only found very poor examples to date, which suggests the build quality was lacking! Almost certainly a model that was being manufactured towards the tail end of the company's existence, and therefore it can be assumed that they were available in the standard Black, Blue, Bottle Green, Grey, and possibly Maroon colours.
Here is a photo, taken off ebay:
