Help identify this Omega Speedmaster reference

Just picked this up and I’m trying to figure out exactly which Speedmaster it is.

The seller listed it as a 1990s Omega Speedmaster Automatic and gave the reference as 1469, but from what I’ve gathered that seems to be the bracelet reference, not the watch reference.

A few details:

• White dial
• Automatic chronograph
• Date at 3 o’clock
• Serial number 55,826,785
• Measures 36.1 mm on the calipers (see photo)

I’ve been looking around and have seen references to both the 3511.30 and 3513.30, but now I’m even more confused.

Does anyone know exactly what reference this is? Also, does everything look original from the photos? What is it worth?

Appreciate any help.

IIRC these were made for the Japanese market. I have one with a blue dial (3511.80); I think the white dial (3511.20) is a little less common. The movement is an Omegafied version of the Valjoux 7750 (cal 1152, maybe?). There is a reverse Panda version - 3511.50 - as well, and I think there may be some other dial colors like salmon or burgundy.