Thanks Jed, I had never known of one that really existed. I have seen a 51 with the swing handles, they kept those around after the push button handles had been introduced.Funny thing about those that I have never heard anyone mention was that the cab was different where the striker bolted on. Yep, the cab was different from the swing handle to push button where the striker bolted, as the striker was different too. The 51 with swing handles that I found had "adapter" strikers! So there are swing handle strikers, push button strikers and the "adapters", there are three different strikers for these trucks.