As far as I could remember 3697 was made around 1996 for the Hong Kong market to commemorate the 1997 handover of Hong Kong from Britain to China. Two hundred pieces were made in yellow gold. White gold versions were also produced, although I am unsure about the number, and 75 were made in platinum with a solid engraved back.
The model which was produced in 1997 to commemorate the 250th anniversary of the birth of Abraham Louis Breguet is 1747.