Thanks to Discovering the Old Philippines: People, Places, Heroes, Historical Events
Strangely this monument disappeared from Davao City, not sure when, maybe 50s. Only to surface in Cotabato City. It was a very good find by a close friend Patrick Jerome when he went to Cotabato City and took a photo of it, below.
Also the Rizal Park Statue, originally located where you have the Bonifacio Rotunda disappeared that time too.