Reclaimed floor boards or new?

[cmb51]

We’re having a side return extension built to our semi-detached house (built 1901) to widen the kitchen, and knock through to the dining room. The dining room and hall currently have the original pitch pine tongue & groove boards sanded and oiled, I would like to achieve the same in the kitchen.
The kitchen currently has boards with plywood on top with tiles overlay. I’ve been under the crawl space in the kitchen and the boards look sound from underneath. I want to remove the tiles and plywood, then sand back and oil these boards. Then...
I would hope to buy reclaimed boards to fit to the extension and achieve a seemless floor between hall, kitchen, New half of kitchen and dining room. Does this sound difficult to achieve? Our builder wasn’t convinced that finding the right boards would be easy? Could I achieve the same with new boards?
Any advice gratefully received!
Thank you

 

[Doggit]

The best advice, is to go hunting for the boards; only then will you know if it's achievable, but looking for T&G pitch pine may be even more difficult. And no, you won't get a good match with new boards, as the beauty of pitch pine, is the closeness and irregularity of the grain. It would be a shame to get rid of the pitch pine, but if you want a complete match over the whole floor, that might be your only solution, but you might make someone else very happy.

 

[cmb51]

Thank you.

Would boards from a 1930s house tie in okay do you think?

Mine are like the photo attached...

 

[Doggit]

They'd very likely match in okay, but you won't get the nice patterns that the pitch pine has.

 

[cmb51]

Many thanks for your help Doggit.
The 1930s ones are like this photo - is this just a standard pine floor?

 

[Doggit]

Yes, very; you can see the difference quite easily.