The super angulons 120 not cheap and 121 cheap but old and tricky special shutter and both are big/heavy but great for movements.
We can only guess but with a wooden field camera you might be looking for reasonable weight , as per above the 120mm are in various flavours vintage and modern and size/coverage . Condition of shutter and lens are important .
If you are looking for a lens complimentary to your newer Rodenstock 210 then if you can find a plain 120 Sironar N. - not apo macro then it might not be too expensive