Pin 1 Identification on Part ST L9637D

[Steve19]

I have just purchased some samples of the ST L9637D from my local supplier, however Pin 1 Is not identified

See attached Image

The following is printed on the IC

L9637D

GK924

Any suggestions woudl be appreciated

Thank you

[Tesla DeLorean]

Nothing like sharp in-focus photography...

Bottom left corner, by the ST logo