I was about to mention 'butkus' but you beat me to it.
As to hoods for old glass, most older Pentax lenses have a 49mm filter ring on the front which will accept all of the Takumar style hoods. I keep one for 135mm to 200mm lenses handy as it won't vignette any lens over 35mm focal length if you are using it on a modern DSLR with a cropped sensor. Readily available on Ebay - (often with a good 135mm lens attached to it). If you are using a film camera you just use the appropriate one for the lens - all easily identified and acquired
Beware though. It's easy to get hooked on old glass. My collection is enormous!

Wild or tame -- you got some rare shots

And can we have a few more entries please?

I shall be the first to congratulate you - especially for the last one

Any idea what they were intended to be used on? They appear to be quite UN used

I recall you first posting this one. Lovely tribute to one's mum (who must be more pleased than you are!)

Raised a smile - thanks for sharing it

These would not look out of place done large (even huge) on any gallery wall

As others have said, try the dry, blower method first. Rocket blowers are not expensive but they are very effective.
I hold the camera upside down at 45 degrees and rotate it in one plane to the opposing 45 degree point whilst blowing, then I do it in the other plane (i.e. side to side and then front to back) taking care to keep the nozzle well clear of the innards. This method will shift very stubborn stuff indeed.

The more I use Faststone the more I realise what an amazing (free) product it is. I prefer subdued borders and I change the colour to some dominant one in the picture (and then you can also change its intensity) and I set the width to 1pixel. You can barely see it but it often does wonders for the image. You can set and place the text of a watermark just as easily