Howdy

If you know what you are looking for you can see the rectangular bottom of the cartridge elevator in the photo. That makes it definitely a toggle link Winchester. Clearly not a Henry, they never had wooden forearms, except for a very few prototypes. Difficult to determine from the photo if the frame is brass or iron, but it looks most likely to be iron to me, so that rules out a '66. Most likely either a '73 or a '76. Difficult to tell the scale from the photo. The '76 was considerably larger because it was chambered for larger cartridges. But the proportions look right for a '73 to me.