Mullard CV4003 from Upscale Audio. My favorite 12AU7 and variant...
https://www.upscaleaudio.com/products/mullard-cv4003-12au7-vintage-new-old-stock?variant=22618913669
https://www.upscaleaudio.com/products/mullard-cv4003-12au7-vintage-new-old-stock?variant=22618913669