This is not a crucifix, "Crucifixion " - a cross with the image of the crucified Christ (or she crucifixion scene )
This is depicted with the Cross of Calvary instruments of the Passion .
Carved icon turn of 18-19 centuries.
Certainly has a historical and artistic value.
And that, you have this icon?
Here 's something you can read about these icons :
http://kizhi.karelia.ru/library/ryabinin-2007/365.html