Is it Chinese?
Yeah check the valve sizes, 38mm for Intake, 32mm for exhaust. 7mm for valve guides. The combustion chambers look really clean, is that a Toyota casting? Almost looks like they have already been cleaned up.
He said its for a mechanical fuel pump (assuming for a carbed industrial motor)
-69XXX does indeed indicate some type of major assy that comes with a bunch of bits.
Notice on the head picks above Chris there are no holes for the EGR valve on the PS of the head.
Also, there is no hole for the exhaust manifold where the EGR gases would recirc.
This indicates the head is either NON-US carby application or other some such.
The block off plate and gasket are available in this market--meaning they are universal application across different engines.