A Vintage Set of Four Silver Plated Butter\Pate Knives by Mappin and Webb

These Little Butter\Pate Knives are in Very good condition, there is what appears to be the Date Letter H inside a diamond which I think is 1936, there is also the letter W inside a Crest, On the front side is what may be a Family Crest the letters SA inside a larger letter C. They are 132 mm long, 21 mm wide and weigh 75 grams.