Ive been working on this mystery for many many years and a couple of years more with it flowering. See this thread from last year Unknown Pear- unique flowers . So far im no closer to an answer. Whats worse is i have several of these trees all with unusual or eratic growth on callery. All have dwarfed callery which may be useful to someone as an interstem once i solve the mystery. This year may be different i got copper on them and there have been no late freezes. Fireblight destroyed what was left of the blooms last year after the frost finished the first blooms. The drought last year did not help those flowers to make fruit either. I suspect this is golden spice or another harbin cross. This pear and one other are the last of the group that had destroyed tags.