cabinetman· Old School
From the looks of the wood it appears to be Maple. I would use a conditioner first. Then, you could use a 50/50 mix of boiled linseed oil and mineral spirits as a wipe on and wipe off. That will bring some life to the color and grain. You could then just use a wiping varnish, which is just a thinned version of an oil base varnish or oil base polyurethane and mineral spirits.