Reggie Jackson Autograph?

When I was a kid, I got a 1975 KC Royals program autographed by a visiting player that I've always thought was Reggie Jackson. Being that I was a big baseball fan at the time, I'm sure the player had to be with the Oakland A's (or I wouldn't have thought it was Jackson), and I see no other player on their roster that year that appears to be a likely alternative.
However, I've looked at other examples of his signature posted on the internet, and I've never seen his signature with only an "R" in place of his first name. For the experts out there, do you think this is Jackson's autograph?
Thanks in advance for any opinions.
However, I've looked at other examples of his signature posted on the internet, and I've never seen his signature with only an "R" in place of his first name. For the experts out there, do you think this is Jackson's autograph?
Thanks in advance for any opinions.

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It don't look like any Reggie Jackson sig I have ever seen .
I have 3 reggie autographed Items in all of them , he used his full name with his player number 44 in the bottom of his letters .
I'm still looking for others that might have that sig though .
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That program sig was his usual "after-the-game-sign-while-walking-very-fast" signature.
The "Reggie Jackson 44" sig is the way he usually signs at card shows and he basically started doing that after he retired, although I have a couple of signed cards that I bought in larger collections that look like they may have been TTM sigs, which are good, but signed with the "44" and at the time I bought the collections he was still playing with the Angels.
i got charles barkley in person and all it looks like is a c and 2 l's but he was signing a lot at a golf course and kept moving
i think it's good
collecting RAW Topps baseball cards 1952 Highs to 1972. looking for collector grade (somewhere between psa 4-7 condition). let me know what you have, I'll take it, I want to finish sets, I must have something you can use for trade.
looking for Topps 71-72 hi's-62-53-54-55-59, I have these sets started
I also have an autograph from Harmon Killebrew on the same program. I remember talking my dad into driving me over to a car dealership on the other side of town to get that signature.