Don't mean to nit pick, but does it have a watermark? The 327 issued in 1976-81 is unwatermarked. Whereas the same stamp was issued originally in 1973 (SC#288) with watermark #314 and again in 1975-78 (SC#288a) with watermark 373. And though I have an old catalogue (2003) the values for these earlier issue is somewhat less.
Just wondered.
