Need to identify a viceroy from Rolex

Hi everyone,

I recently found this watch at a flea market and I need your expertise to identify and authenticate it.

Here is what I can read on the watch:

📋 DETAILS

• Dial signed: VICEROY / Swiss Made
• Case back: ROLESOR + crowned SAR hallmark
• Case reference: 2178
• Serial number: 840891 (which would date the watch to approximately 1926-1927)
• Movement: 16 Sixteen Rubies / Swiss Made
• Case: rectangular Art Deco style, two-tone (Rolesor = steel + gold)
• Original…

Need to identify a viceroy from Rolex