Hi Widge,
I'll go out on a limb and speak for Roger; I believe he was not seeking apologies just clarifying details as many of us who collect obsessively like to do.
We're here to learn and to discuss, or at least that is one of the missions for this board. Unfamiliarity with something certainly does not require apology. Indeed, we'd have little reason to have the Board if everyone already knew everything that anyone happened to discuss. We'd have no questions. It would be... boring. This is a good discussion. We've confirmed your new set is Roseglow. We noted the image posted seemed a bit distorted, making final sizing difficult if based mostly on that shot. In my view anyone who has uncertainty about something is serving the prime purpose of FPB by exploring that uncertaintly.
Returning again to your pen, I note that there are three models in White Dot form for Balance that can be about 5 1/2" long: Sovereign is slender, Statesman is Standard, Premier is OS. The OS Barrel indeed is about 1/2" in diameter. As Roger had noted the cap though is wider. You didn't specify which part of your pen is 1/2" wide. Options are open. Still, even with image distortion, something about your pen suggests a non-OS. When you get it, do share more shots.
One thread I offered awhile back was Absolute Roseglow, showing my fairly extensive collection of Roseglow pens. Here is link:
ABSOLUTE ROSEGLOW
I'll share that image here. At risk of grandiosity, I suspect this is one of the most comprehensive accumulations of Rosies out there. There are some interesting variants here as well.
regards
David