Is it possibly just a flare tip that has had the 'tip' painted red?
The 'normal' flare tip would be OK with an 'H' serial, but an 'H' serial Red Tip seems to go against Gillette serial numbers.
Sorry, not trying to burst your bubble...just an inquiring mind at work, as I too would like a nice Red Tip one day.
You are correct sir! Speedy fingers and lack of proofreading strike again. It is in fact an E2...