Unlikely to be older than 1930 - I would think probably a little more recent than that, though I agree with Chris, the weave looks old, and to me the wool, too, and the rug has a feeling of authenticity to it which, say, many mass produced 'bokhara Turkmen' rugs don't have.
Are the knots symmetrical? (still learning - can someone confirm?). In that case, Baluch copy of Turkmen is less likely then Turkmen?