Monte Dunlavy art glass vase

This beautiful vase was in my mother's collection of items she loved and had out on display, she sadly passed away recently and I now have it in my very small collection of art glass. It is 7" tall, has Monte Dunlavy engraved on the base. My mother lived most of her life in Sydney, NSW Australia and has not been to the USA, she would have picked the vase up at a collectables shop near her home. I saw a comment from ReginaDun that Monte Dunlavy is her father-in-law and resides in Indiana. I would love to know more about the vase, when he would have made it and where.