This part is a kind of semiconductor called AK2.

Function of this product has Octode 1947.

Manufacturers : Philips

Image and pinout :

Some of the text within the PDF file :

page 1 2 3 4 AK2 sheet 1 1 2 FP date 1947.12.01 1953.12.12 1959.12.12 1999.06.26 [ ... ]

AK2 PDF Datasheet Download