What Is It And Where Is It From?

Hi Folks.
Anybody have an idea where it is from? Interesting I think is what I believe to be a mistake. Written is P.S. Sirius, when I am pretty sure it should read S.S. Sirius. I know the story of the ship and the race. I just wish I could place the stamp. I also include a close up of some numbers found on the bottom of the stamp ( if that it what I call it) that might be of help (not to me)
Thanks in advance for any help

As the ship's name was "SIRIUS" the S S (Steam Ship) or P S (Paddle Steamer) was interchangeable, I would expect.

"Written is P.S. Sirius, when I am pretty sure it should read S.S. Sirius."

Either : The PS refers to "Packet Ship"
Cinderella would possibly best sit under Ireland. Scotland

Guess : SPSA = Scottish Paddle Steamer Assoc
http://www.paddlesteamers.org/about/scottish/

I stand corrected, as Scotzm suggested "Paddle Steamer" may be more appropriate
I was thinking more along the lines philatelically.

https://en.wikipedia.org/wiki/Packet_trade

On its first crossing, it took just 6 passengers, 4 "of the Ransome family of Wiltshire,
and Mr. and Mrs Davenport.

This cinderella also exist in brown.

Thanks guys. So not a mistake at all. I thought unusual in that it does not seem to advertise anything. Who would pay to produce such a thing?

"Who would pay to produce such a thing?"
rod222 has already given the most logical reason... a paddle steamer association selling a few sheets/miniature sheets etc to raise funds, raise awareness or celebrate that event.

Regarding the P S or S S... it is a matter of individual or company preference as to how the ship named "SIRIUS" would have been described.
Various definitions of ships exist...
SS ... Steam Ship or occasionally Screw Ship after the introduction of propellers.
PS ... Paddle Steamer or, after the introduction of trans-Atlantic mail, Packet Ship (but usually only if officially hired to carry mail)
PSS ... very occasionally described as Passenger Steam Ship

Thank you guys. All very useful and interesting information :)much appreciated.

Thank you guys. All very useful and interesting information. Much appreciated :)