Westminster chime clock

Please don't get upset if this is not as exciting as a schoolgirl fight, or somebody getting hit in the nuts. It's just to document the old Westminster chime wall clock that I got recently on eBay, and to demonstrate how it looks and sounds to a few friends online. The seller described it as a German clock ca. 1900-1910, whose movement was unmarked, although he said it looked almost identical to a Kienzle movement in another clock that he had. The case is described as being for the "French market," and it does indeed have a little hook inside with a round plaque around it that reads "Sonnerie Arret," and I do know enough French to figure out that it's for a little string that attaches to the lever that blocks the hammers from striking the chime rods, if desired (but really......where's the fun in that?). What I'm really curious about, though, are the melodies of the Westminster chime sequence as played by this clock. To me, the actual pitch of the notes played seem to vary somewhat from what I think of as the Westminster chime melodies. In listening to other Westminster clocks online, they seem to get it "right" to my ear, while this one seems a bit "off" one a note or two. It is not unpleasant or jarring, but I'm just wondering......is something awry here? Might a rod or rods of the wrong length be inserted into this particular array? Or is this a common variation among old Westminster chime clocks? Or am I just hearing things? The longest rod here is about 18 inches, and they do have a lovely deep tone. But aside from the tone, I can't help wondering a bit about the tune.