3 piece 7 O'Clock razor

Hi All. 

Please find an interesting, and I suspect quite rare, 7 O'Clock razor that I picked up a little while ago and which arrived today. I didn't realise it was a 3 piece when I bought it, so a pleasant surprise! 

I have a few vintage 7 O'Clock razors but not a 3 piece. In fact, I wasn't aware that 7 O'Clock made one.

Anyone have any information?

Photos courtesy of my daughter (Bec) btw...... hence the nail polish!

Adam