Absolutely! In fact, i was looking at those type on rBay and Etsy.It's a thumnail type by the looks of it.
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Thumbnail brushed screw-in pin buckle for watch bands (Panerai)
Design Thumbnail pin buckle : - efficient attachment with a screw-in spring bar ; - excellent finish ; - large pin machined in the mass. Brushed stainless steel model (mat). A sporty streamlined buckle, with sharp angles. Suited to sport straps, ideally for Panerai. Width (inside...www.esprit-nato.com
I believe the one from the original movie strap is definitely more like that; chunky, brushed ss but i think a bit more flat overall.
If the pin which goes through the holes were a little slimmer and the front reduced in width and curve, it would be very close i believe.