You said Narrow Front, red and grey paint.
There was a 961 built in 1958 by Hubley with a 3pt and in good condition is worth about $120. Execelent is $225.
I would need more infro to get the other prices.
There were about 20 different 900 series tractors built in 1/16 and 1/12. Even one in 1/10 scale.