Mine was made in 1978 and has Eliason sights.
Acro on the one I'm looking at on the net. I changed my Python from Acro to Eliason, easy to do. I believe you're right, Eliason can be used on any of those models. Thanks for the replies.Both my .44 Special and .45 Colt New Frontiers are 1978 vintage and have the Accro sight. My 2012 New Frontier in .44 Special has the Eliason sights.Its my understanding some old New Frontiers were fitted with Eliasons, but the Accro was run-of-the mill.Someone told me the Python, Gold Cup, and New Frontier could be interchanged, never tried it, though.Bob Wright