Are you sure its 72 inches and the Yoeman model?
It was sorta a shrew like design bow but had a more mildly reflexed limb compared to a Shrew/griffin or more recently introduced forward style longbows.
Even his more traditioonal longbow did not come in 72 inch lengths.Maybe this is an experimental model you are looking at or a one of kind bow and length possibly.
I had 2 Yoemans and quite a few of the mild R and D longbows that were offered in 60 to 68 I believe.They were called the Squire,Baron and Regeant depending on how fancy they were and built on the same form.