rraack,I dug mine out of the attic.I forgot it had an applied blob top.But it does have a huge Iron pontil.The color of the bottle is like yours and the iron pontil mark is almost like a womans rouge applicator.The area covered by the iron on this bottle is just in a larger diameter of coverage.
The Whitney glass works where this bottle is from I believe went through a phase where even on the Booz bottles where they were using an applied blob type top.You dont see very many however.I wonder if the same person was responsible for these tops.I do have another bottle like yours a Robacks I just cant find it right now.It is buried in the attic.The only reason I found this one so fast was it was in a box I went through last week and I had remembered seeing it in there.