The crown on your watch is correct and original, but the gold plating is very worn. This is common with vintage watches. One of the main reasons why most collectors accept watches with replaced crowns, so long as the replacement is correct for the reference.
It's a lot like replacing tires on a vintage car. Some collectors will insist on the original, no matter what the condition. Others will want to drive the car occasionally, so modern replacement tires need to be fitted.
To satisfy both kinds of collectors, be sure to save the original crown with the watch.
Do a search on Ofrei's site for "168.025". You'll find it.
"Omega Crown 43068 Yellow, Fits Case 167.015 and 168.025 New
Fits Case numbers 167.015, 168.015 and 168.025
Crown 8100/1194Y Omega 43048 fits the old version of case and 8100/1220Y Omega 43068 fits the new version of the cases listed. Today Omega list old 43048 and new 43068 as being replaced by the crown 42524. The terms old and new are used in the 1972 B. Jadow listing of Omega crowns.
For 18kt gold case and gpld cap and plated cases 166.0105, 167.015, 167.0015, 168.025, 168.002"
Hope this helps,
gatorcpa
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