Differenc between Ref 371923 and 371933?

CAN ANYONE HELP TELLING ME THE DIFFERENCE OR PRODUCTION YEARS OF IWC
ACQUATIMER 371923 AND 371933??

BEST REGARDS

WRIST WATCH DENMARK

KIM

The IWC Aquatimer IW3719-33 was available from 2004 to 2009. It features a
stainless steel case and a black dial. It is fitted with a rubber strap.

The model fitted with bracelet is designated IW3719-28

Models in Titanium had the following designations:

Rubber strap - 3719-18, Ti Bracelet 3719-03