I know this is a relatively common stamp for this issue, but I've been wondering how to evaluate it. Here's scan of the overall image and a close-up of the "triangle" in an attempt to determine the type:


Now for my questions:
1. I think it's a Type III (Scott 252) ... am I correct?
2. The stamp has no gum; yet it appears uncancelled. Again, am I correct or would anyone evaluate it otherwise?
3. Assuming a #252, the catalog value of a used copy is $14; an unused $120, although I know those values are based on XF condition. However, this example looks pretty decently centered, so would I expect it to be rated in VG-F condition?
4. With no gum, I will assume this is much closer to the used copy value, but given that there is a considerable difference between used and unused prices, how would you evaluate this particular stamp?
Any comments/opinions would be welcomed.