This is a aftermarket remote key, the part number just for reference, our keys have no number in the key shell.
Part number: VALEO 736 743 A, VALEO 736-743-A
Transponder PCF7941 (ID46)
Profile: HU100
Button: 2
Frequency: 433mhz
Work on: Vauxhall Opel Astra H 2004 2005 2006 2007 2008 2009