The photo does look like a Secret Service series knife. There were many variations, solid stainless, slotted stainless, G10 scales, some with the USSS crest, some with "Secret Service" written on the left side scale. Some had no clip and came with a sheath, others came with a clip for point down carry,
BUT- this is the first time I have seen one with an "Al Mar" and chop mark logo on the scale, in addition to the blade.