I recently bought a Pogue of eBay UK. I think most of mine is original, though I have doubts about the bezel. I'd agree with the earlier poster that the bezel insert, dial and hands look like replacements on your one. The case finish looks very good, which would also raise suspicions in such an old watch. You mention the materials not being too good and I'd tend to agree as the case of mine is pretty battered. Either it was hard worn, or the steel is easily dented.
Having said all this though, even if some parts are replacement, these are super watches to wear. Very eye catching.