<p>Given the number of OM1s I run across without the cap, I'm convinced that Olympus made far fewer motor drive caps than cameras. :)<br>
As mentioned above, there was a place in the drive to store a cap, but drive and body often get separated over the years. And I'm sure many ended up in drawers.<br>
My solution (to use the term broadly) is wide electrical tape of good quality (not the cheap junk). <br>
IIRC, all the caps were silver, even on the black cameras. But I'm not positive on this.<br>
If buying a parts camera, make sure it does, in fact, have that cap. <br>
Also, early OM1s had an issue with the foam around the prism. You may want to search to a) see if yours is affected and b) educate yourself on the issue.</p>