Please verify if this is a real Tudor watch

[newshawnee]

I was given this watch as part of an estate inheritance. I noticed the markings "220m=660ft" is wrong? Shouldn't it be 200m as in all the other ones I see on the internet? Also the word Submariner is kind of larger and more cramped font than all the other confirmed real ones on the internet. Even the work Tudor has cramped spacing compared to others. But its been in the family since 1985. Serial number 756029. Not working either. Is this an early fake? See pics. Thank you for any assistance.