It's the AMCO Porsche licensed Porsche Crest knob (came in leather-wrapped or Walnut, also had the 5-speed pattern version), which were sold by Porsche Dealers as an accessory option, & found on many 914s & 911/912/930s of the 1960s-70s.
While not the basic black moulded plastic/bakelite knob with the 5-speed pattern that our 914s were fitted with at the factory, IMHO it's an acceptable period correct dealer sold optional upgrade.
The cloisonné Porsche crest looks to be in very good condition, & the dings in the wood can be sanded out - so try smoothing the wood & cleaning it up, new varnish or oil on the walnut, clean & polish the crest & trim ring - & I'll bet it will look almost new!
BTW - you can leave the wood dings/dimples & refinish it as marked for authentic age & use look, but best to use oil for that (usually from the driver's ring[s], I now on my leather version).
Curtis/cabinetmaker can probably recommend the best finishes for the walnut.
FYI - they sold for $5-7.50 new in either finish or badge back in the day from dealers, & today recent sales for NOS ones has been $75-100+.
Porsche still makes & sells the OE knobs new (& there are nice used & repro ones out there too), but I prefer the crest one personally!
http://www.classicshop.porsche.com/pcos-us...0142401400.html > without the crack! .
Cheers!
Tom
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