KU's Puzzle #1650 - Climber Model 6-50

[Otto Puzzell]

Know what it is?

Please, respond below and identify what this is, and who built it.
As always, detailed answers are greatly appreciated by all. 
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Also, please be sure to check out our other puzzles, and, please post a puzzle of your own if you'd like - the more, the merrier.

Thanks!

[Otto Puzzell]

Experts?

[DeAutogids.nl]

That's a Buick, no?
A series 23?

[Otto Puzzell]

No, not a Buick

[Otto Puzzell]

Time for a fast Pro point.

[Arunas]

Chandler?

[Otto Puzzell]

Not a Chandler

[Oguerrerob]

Crane Simplex?

[Otto Puzzell]

A bit more obscure than that (at least it was to me, before I stumbled across it).

[João]

1923 Climber Model 6-50

[Otto Puzzell]

Yep