I'd replace it with a DEMA. The GC is not a very good valve. A DEMA 474P (if the one you need is 1/2") has a stainless seat that won't erode away like GC and Asco does.
That's a GC valve. The white decal on the coil has the model number it. If you know size of orifice, coil voltage, whether normally open or normally closed, and operating pressure you can generally replace with most any brand. You can probably buy a replacement on Kleen rite.
Please use the money you saved to buy a newer phone or photography lessons.
Thanks to those that knew the brand was just curious more than anything. I know the size and will probably go dema anyways. As for pic quality it was a picture of a copy of a manual. I cropped and zoomed the photo of just the valve in the diagram.