OFTD's very own Advent Calendar with a door a day opened, before the big reveal on the 24th - Sue in a manger.
Welcome back, Sue. Good to know you managed to steer your TARDIS down to present day OFTD and herald the arrival with a very Doctorish thread title.
It can be seen in many 'surviving' routines, so your probably barking up the wrong tree. The picture looks like a face or a mask and much too big to be worn round your neck. There is only one TOTP routine missing where Sue is 21 or older 19/09/76.
I'm thinking she'll be closer to 18.