Agree green without wasp stripes is possible - see D2088 below. Having checked my pics I don't have any shunters with horizontal stripes - certainly 15100 has the chevrons - 15201 may just have horizontal stripes but the photo is broadside on so it's impossible to say. All photos below are by me and my copyright.
D2088, Swindon Shed. 23 May 1965. Another of same class with wasp stripes behind. Clearly some locos were still wearing plain green without wasp stripes quite late in the day and with the later BR totem.
A truly awful photo of an unidentified 08 at Cricklewood, possibly April 1964. (It was one of those photos which is so poor I didn't bother to identify date or details. What a plonker! The date is taken from other photos at Cricklewood which I believe to be contemporary with this one.) However, this may have been green or black but clearly had no wasp stripes.
D3052. Willesden on 14th March 1965. Livery may be black or filthy green, but still no wasp stripes. Dunno what totem it was wearing though.
12058. Definitely black. Definitely no wasp stripes. And it's wearing the new BR totem. Willesden. 14th March 1965. So is this a combination we've not considered previously? Maybe at it's last overhaul they'd run out of green paint. Or maybe this livery only applied to the ex-LMS shunters although some of them definitely carried green with wasp stripes - I have the photo to prove it:
12105. Stratford. 28th August 1965.
I hope Dapol produce a black 08 with early totem in the 13XXX number series. If they do so I'll have one! However it is my belief that they are not incorrect in producing a green 08 without wasp stripes and with early totem. It's just the possible dates of such a livery which they have wrong, and would a loco with that livery still be carrying it's 13XXX number?
Brian