1803 non-quickset. New dial won't fit!!!

[pech01]

Dear all,

I have an 1803 watch from approx 1974 (non-quickset) with a caliber 1556 movement. I want to change the pie pan dial to another.

The dial I want to change to is also a pie pan 1803 dial, but it won't fit. As you can see on the picture (dial on the right) the "pan pie sides” is lower on the dial I want to fit than the sides on the present dial (dial on the left).

Also the dial I want to change to, has no sunken center (as the present dial has – picture to the left).

Have any of you heard of differences between caliber 1555 & 1556 dials or have had similar fitment issues?

Any other suggestions on what dial I might have? It’s bought as a 1803 non-quickset dial, from a respectable source.

Thanks in advance.

Peter