$ cat cards/nikola-milenkovic-421x-2018/faq/completion-faq-21.md
Is Nikola Milenković 421x required to complete the Panini virtual album?
card: Nikola Milenković 421x (2018) · category: completion
[Concise Summary]
Yes, Nikola Milenković under code 421x is required for basic album completion. The checklist defines 685 core stickers that must be collected to claim the final completion badge.
[Structured Data Grid]
| Album Slot Required | Yes |
| Total Checklist Size | 685 slots |
| Completion Threshold | 100% core set |
| Companion Status | Verified active checklist |
Detailed Investigation & Analysis
Basic completion rules require filling every numbered slot in the standard pages. Missing items prevent the final digital badge from unlocking. Since Nikola Milenković is required, check your binder checklist to verify slot status.
Additional notes for collectors: Ensure checklist entries are verified before confirming trades. Standard trade ratios are calculated relative to card popularity.
[Album Context Specs]
| Card Code | 421x |
| Official Name | Nikola Milenković 421x (2018) |
| Estimated Value | $1.25 USD |
| Album Section | Serbia (2018) |
| Completion Mode | Required Checklist Item |