As a matter of fact these straps fit perfectly on the 2254.50. Its like they are made for, curved neatly around the case and flush with the lugs. I had this combination on mine and you do need skinny spring bars as the holes don't quite line up. It is the same strap made for and used on my Explorer II 40mm or Sub 14060 no date. I have now a RubberB black rubber with tang (same case fit) on my 2254.50 but took the tang buckle of and fitted a 18mm black PVD coated Hedley Roma butterfly clasp. It all works and fit very well.
I was so impressed with the combo I fitted the RubberB black rubber with red VulChromatic on my SMP 300 quartz. The red on the strap complements the red on the second hand and red Seamaster logo on the dial very nicely. Also fitted the black Hedley Roma butterfly clasp on this one.
Sorry, no pics at the ready for now.
The Velcro strap I took of is now for sale here on the forum, size M fits a wrist up to 183mm.