I am new here and have used the forum search function to read and learn a great deal on many topics and watch references. I was surprised to find so little information / discussion related to Tudor Big Block Chronographs.
I have three all original unpolished Big Blocks that honestly do not get a lot of wrist time but I do enjoy having in my collection. While prices are steadily climbing; I’m surprised they are still priced so low relative to their Rolex Daytona cousins that seem to be skyrocketing in price lately. All three have some Rolex DNA with Rolex Hallmarked casebacks and crowns.
This is my reference 94210 silver dial with black subdials and black bezel.

This one is my prized reference 79170 black dial with white subdials . This one is a complete “full set” that I prefer to wear on a distressed leather bund strap and leave the original Tudor Oyster Bracelet in storage.

This one is a reference 79180 “Albino” dial with stainless steel bezel that is also a complete “full set” in NOS condition.

I hope you enjoy seeing these examples of a relatively rare and under appreciated three register automatic chronograph.