#1510 10c Jefferson Memorial Gum

Were these stamps issued with white/dull/invisible gum?

I don't see anything in my Scott catalogue alluding to this type of gum.

Scott only mentions the gum type when the stamp was issued with more than one type. Hence 1510 must have been issued with only one type … my copy has shiny gum. Ergo, all 1510s would have shiny gum.
As requested, front & back of 1510 mint block of 6:

JLLebbert: If it isn't too difficult, would you mind posting a photo of the gum of your 1510 stamp?

I could be wrong as I am going strictly by memory, but I think some (all?) of the 1510's from booklets have dull gum.

eyeonwall … now that you mention it, I do think I remember booklet stamps with dull gum. Strange though that Scott makes no mention of it. Perhaps that is because ALL of the booklet stamps had dull gum. I do know Scott mentions the gum type for 1395 (8c Ike) … but for that issue some panes had shiny gum while others had dull gum.

I looked at Durland catalog and no mention of gum type.

I found an eBay listing for pane 1510d that shows the gum side of the stamps. They do appear to be dull gum. Since there is no mention of gum in Scott for any panes, I would assume that all 1510 panes (1510b in BK124, 1510c in BK125 & 1510d in BK126) had dull gum. This is new to me … I had always assumed that Scott included gum type whenever any entry in a listing involved multiple gum types. For issues involving both sheet & booklet panes, that is apparently true only for each format, sheet or booklet … not for the two formats together.
So I think eyeonwall's memory is far better than mine. ALL 1510 booklet panes must have had dull gum.
Added: Just discovered that the seller, in his description, indicates that the stamps do have dull gum. Item # 143357171852.
Also located a 1510c pane that a seller describes as having dull gum.