Another find whilst in Tasmania is this little Williams No. 402 Deep Throat Clamp. I am looking to get some information as to the production date range of these clamps, if possible. Cheers

Well I can't help but it seems like someone here had an old Williams catalog they could check..?

Here it is in 1937 Williams catalog:
https://archive.org/details/193706jhwilliamstoolsbuffalony/page/n139/mode/2up

Other Williams catalogs to check:
https://archive.org/search.php?query=creator%3A%22J.H.+Williams+%26+Co.%22

Thanks Notlobster for the references, it will add a pleasant variety to the day looking thru. the catalogs whilst we are stuck at home, during these trying times.
Cheers. Danks