Hoping this helps you identify which 99k you have. [TABLE]
[TR]
[TD]99K-10[/TD]
[TD]Aluminum rather than iron head (not common)[/TD]
[/TR]
[TR]
[TD]99K-13[/TD]
[TD]Electric portable with wooden cover or carrying case, knee control[/TD]
[/TR]
[TR]
[TD]99K-16[/TD]
[TD]All metal (electric) portable with carrying case[/TD]
[/TR]
[TR]
[TD]99K-17[/TD]
[TD]All metal (electric) portable with carrying case[/TD]
[/TR]
[TR]
[TD]99K-31[/TD]
[TD]Solid balance wheel and ‘reverse’ facility[/TD]
[/TR]
[/TABLE]