Matching new oak to old oak in repair.

Here's the problem. I have been doing a repair to an old (50 yrs.), much repaired (badly),clerck's desk that's been in the family. Not particularly valuable, but means a little to some of us. Have had to replace a panel on the top with a 12 in. by 24 in. piece of new red oak and made new legs and skirting. All have been replaced before at least a couple of times. Would like very much to retain the look of the old oak and not have a two toned look. It has always been finished without staining and I would like to return it to as natural a look as possible. I was thinking of a pecan stain with a little walnut stain mixed in for just the new pieces, but am a novice so would appreciate any ideas. Thanks ahead of time.
John

try strong tea/coffee or
potassium bichromate solution or
nitric acid

or the special treatment for ageing oak ... ammonia.

do tests

You might want to consider using some of the colored shellacs, there are several different colors to choice from, you could also combine the shellacs and create other colors.

Always, make up complete samples before you work on your project.

Good Luck

Well, appreciate the ideas. I'll have a go at it today and see what I can do. Will post results later. Thanks for the help.