If it's an early model C150 it'll have a straight tail and won't have Cessna's 'Omni-vision' (tm)** feature. 'Land-o-matic' (tm)** undercarriage was fitted as standard across the range.
Nearly correct, The D and E models('64 and '65) have Omni-vision and straight tails. They also are the last 150s with a flap lever. The '64 D (not sure about the E) have an electric stall warning and a pull starter. Another nice thing about the D is its relative high payload. In '64 Cessna raised the MTOW for the 150 by 100 lbs but used only 50 for the Omni vision and some other upgrades. My D has an empty weight of 491 kg, MTOW 725kg. The means the two of us with full fuel have about 20kg left for luggage.