The Crown is acceptable.
Do you wish to include that crown on the design? Or the crown is for reference only?

The Crown can be included in design as a focal point or alternative if your creativity goes elsewhere

FYI -- I just added the original quality of the crown in TIFF as an attachment; however, it has since been reworked in new design (what you saw), but the only available copy we have is in PDF for that one, which is layout we would want to use should you decide to use in your mockup.

what colour do you prefer for t shirt?

In the past we had a brown design (see new attachment just uploaded), but we don't have to do same color. We would like option of several colors that design would work with, such as Heather Gray, Charcoal, Heather Dark Gray, Ash Gray, Storm Gray, Honey, Natural, Sand, Vegas Gold, Yellow Haze. I particularly like the colors Ash, Sport Gray, Vegas Gold at this link: [Non image link removed]

You can google either "vintage scrum t-shirts ancient grey" or "Scrum Vintage T-Shirt - Gold" (designcrowd will not allow links to be posted)

Also, Heather Brown by Delta Apparel