A while ago I made a couple wooden shift knobs (http://www.classiczcars.com/topic/44856-making-a-wooden-shift-knob/) and while I think they turned out pretty well, I've always knew there was some room for improvement. They were "close" to the original design, but just different enough to bug me. So with that in mind, I set out to make couple more with the intent to see how close I could reproduce the original knob.
After a completely unprofitable and unreasonable amount of time, effort, trial and error, and raw materials, this is what I've got. The knob I made from scratch is on the left and the original Datsun knob is on the right. Only catch is that since the shift map from the factory knob was crazed and cracked into multiple pieces, the shift maps in both knobs are reproduction pieces that I made:
Here's a side view. Note that my base is real metal instead of metalized plastic:
I was on a roll, so I also made another knob to accepy my red 5-speed emblem as well. Here's the happy family:
I'm still working out some of the bugs, but I'm pretty happy so far. Under magnification, I can still see some remnants of the damage from the original shift map that I used as a pattern, but I'd challenge the casual viewer to discern the difference between mine and an original factory knob in excellent condition.
I don't have an older style 5-speed knob, but if I had one to use as a guide (hint hint), I could probably go through the same process with it as well.