Yes it's the real deal. Western started making the W49 in 1964. In 1977 Western started the practice of adding a date code to most of the knives they produced. That practice continued after the Platt family sold the company to Coleman in 1984 thru to 1991 when Camillus bought the rights to Western at auction. I've identified at least 6 variations and I think there may be a 7th between the years 1964 and 1977. The first two variations in the W49 were marked on the blade and they didn't include the stock code (W49) but did have the name Bowie on them. In Western's 1968 catalog they say that all of their fixed blade knives are marked on the guard with the stock number of the knife. I have fairly good evidence that the W49 of the 2nd version, (blade marked on the name side of the blade only with WESTERN/BOWIE/U.S.A., in 3 lines), was still the knife being produced in 1967. IMHO, contrary to what the catalog states, I believe the first guard marked W49 had BOWIE stamped on the pile side of the guard rather than W49 when they made this change in 1968.
The markings on your knife appear on both (what I call), the 4th and fifth versions. These are the guard markings that were on the W49 when they changed from the original handle to the version in your pictures. This is why I identify it as version 5. I haven't found a precise record for the dates of each of these versions, but at this time IMHO I believe your knife is from around 1972. This is based mostly from correspondence with other owners and collectors and is still an opinion.