Identifying a knife unseen is uncertain at best. If you have a scanner, even that is better than nothing. However, I'll give it a shot.
I think your knife as described would be a 4 1/2" SS700 Sampler. Melon tester, fruit knife, citrus knife and sausage knife are popular names for these patterns. SS, logically, denotes a stainless steel blade, as all of the knives of the "Razor Blade Stainless" series were. The SS700 is an older pattern which I see listed as far back as 1955, but is likely older. Most samplers seen are just long bolsterless pen knives of the slim senator pattern. The SS700 has bolsters, and is what used to be referred to as a "balloon" pattern. I think this is mostly called a "swell center" now. Sampler knives are usually seen with some sort of advertising stamped on the covers, since fruit, vegetable, and meat suppliers were the biggest customers for them, giving them away to their own customers. I would think they would be more expensive to produce and sell with bolsters and two blades instead of one.
This pattern was produced under the Ulster tang as well, though bolsterless and with "rosette", or birdseye rivets, as the US-7. My 1961 catalog shows it, but it is top-stamped "discontinued". The 1961 Schrade Walden distributor catalog does list the SS700. They were also available as the SS700WE with the serrated Wonda-Edge, and unlike the Ulster version, were bolstered. The covers at this time were described as being Marine Pearl Plastic.
In 1965, I see them etched and displayed in the "Razor Blade Stainless" series. In the early to mid 1970's Schrade Cutlery Corp. catalogs, they were listed as "SS700RB". Retail was $11.35 (not including custom imprinting). By 1983, the price had risen to $21.95. I do not see this pattern listed after that.
Michael
