Vintage Firebird pickups

Hi,

I have 2 old Firebird pickups but how old they are is for me hard to tell. Can someone help me out?

1: -gold cover
-it says pat. pend. on the baseplate and that´s all, no number or sticker
-no holes is the baseplate

see pictures,

http://i1262.photobucket.com/albums/ii613/art027/FirebirdPatPend.jpg

http://i1262.photobucket.com/albums/ii613/art027/FirebirdGold_3.jpg

http://i1262.photobucket.com/albums/ii613/art027/GibsonFirebGold-1.jpg

2: -The other pickup is a chrome colored one that is slightly bigger, 2 mm orso
I don´t have a picture of the back or inside.
- It has 6 holes in the baseplate
- It says pat.no. 2737842 on the baseplate

Any help apreciated.

Thanks,

Michell, The Netherlands