Can you ID this Motorola Walkie Talkie from The Fugitive?

Have done my head in trying to pin down this particular model Motorola 2way, The main distinguishing point is the back of the battery and ive matched that up to a HT50 but that model doesnt have two seperate push to talk buttons on the side. It appears they used the same model Motorola throughout the movie.

Any help pinning it down would be greatly appreciated.

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