This is a photo of the team at International Harvesters in Doncaster and as usual dad is on the back row (centre).
The only other face I recognise is Pete Milan (middle row, third from the right) and the only other name I remember is Graham Dixon, who remained another life long friend of dad's.
This is a sightly later photo, taken in March 1976, also at Harvesters, and this maybe the prototype of the 165 "crawler loader" which came out in 1978.
Quite difficult to pick out faces here, dad is there (unusually) in the middle row, six in from the right.
This is a group photo of what could be the entire staff of International Harvesters, Doncaster.
This image has been reduced so it is hard to make out faces and names, if you'd like a high resolution copy then please email me at the address on the front page.
This is an enlargement of the previous photo with dad in the middle and the late Norman Watson and Neville Thornton either side of him.
I am very grateful to Andrew Semple for suggesting those names and thank you to Carole Shaw at the CASE IH Club UK, for putting me in contact with Andrew.
In amongst his papers I found the Harvesters job advert from 1969 and the offer letter dated 28th July 1969 - a week after Apollo 11 landed on the moon!
For the position of Test Engineer he was offered £26 a week.
In 1978 he was elected a member of the institute of mechanical engineers and rose to the position of Chief Product Development Engineer.
If you or a family member worked at Harvesters between 1969 and 1982 and have any photos or memories of dad, please do contact me - the email address is on the main page.
Here we are on a family holiday in Filey, in the mid 70s - mum, dad, younger brother Matt and me.
Most of the seafront hasn't changed much over the last 50 years, so it always brings back happy memories.
This is a sightly later family photo from 1978, we're standing in my grandpa's garden, in Worksop.
I don't think that either dad or me inherited his gift for gardening!
This is another photo from 1978, our family holiday in Robin Hood's Bay, North Yorkshire.
Despite the British summer weather and the very spooky guest house, I thought it was a "supper" holiday, or at least that's what I wrote on the postcard I sent to my best friend!
What I do remember very vividly is a shop that sold ships in bottles, I don't think it's there any more.
I'm guessing that this was also taken in 1978 during a trip to London.
It does look a bit cold and grey, so possibly February half-term holidays.
This would have been my first trip to London, I don't remember much about it, can't have been that impressed!
In 1980 dad briefly experimented with a new look, I think he may have shaved again after I told him he looked like Noel Edmunds!
This was taken at the cottage in Beckingham, and by this time me, my brother and mum had moved to Retford, so it was quite a surprise first time I saw him with a beard.
I think he was equally surprised the first time he saw me with a beard nine years later.
In contrast, here is a photo from around the time he joined Harvesters.
Either a passport photo or maybe for his work ID badge - there were two identical images on the same print.
Between 1980 and 82 while dad was still living in Beckingham he joined a hiking group.
It sounded very serious, setting off at the crack of dawn, often wading through knee-deep bogs.
He had a collection of certificates and badges for the Lyke Wake Walk, the Three Peaks (Yorkshire), the Pennine Way and others.
I am sure it was his scouting days and Duke of Edinburgh award expeditions that developed his enthusiasm for serious hill walking.